6 ms·

HackerOne breach lets outside hacker read customers’ private bug reports

82 points by louis-paul 7y ago

DyslexicAtheist 7y ago
if a platform which stores information about current 0days in their system get's pwned by an OWASP top-10 it should be considered gross negligence on their part. this isn't the security researchers fault but HackerOne trying to spin the story to their advantage. Absolutely disgusting, but I wouldn't expect anything else from them. We should agree to a system that auto-pwns (takes offline) anything that has an OWASP top-10 in it. janit0r had the right idea when s/he/they took all those IoT devices offline. The Japanese did something similar (iirc in 2018). the top comment in the article nails it: > I'm not a fan of a vulnerability reporting platform giving someone grief for finding a vuln in THEIR platform. Of all orgs, HackerOne should understand the optics of how they communicate with a reporting party. Interrogating your voluntary reporting party with things like "why did you access so much data, you didn't need to" is just stupid, that's common exposure assessment practice for most in the industry. Your vuln was found and exploited either way. Your choices are two: 1. Honorable guy validates scope of access and reports it. 2. Less honorable guy pwns your shit. Come on, HackerOne. EDIT: there is so much we could do (programmatically) using .well-known/security.txt to drive automation for all kinds of things in addition to mere providing of a contact point to report vulns to.
- shkkmo 7y ago
  You should read the actual report [0]. HackerOne repeatedly thanks the hacker for the report and awards a 20k bounty. > Thank you for confirming you no longer have unauthorized access. As part of our investigation, we also want to make sure we have all the relevant information from you to ensure we’re capturing everything, even as we review our own logs / audit records. As such, we would appreciate your answers to a few questions to assist us. HackerOne ask a bunch of questions about what was accessed. > Again, thank you so much for responsibly reporting this issue to us. We really do appreciate it, and we thank you for your assistance with our investigation. Then later after awarding a 20k bounty: >To make it clear on how we believe these situations should be handled by hackers, we’ve added a clarifying section to our policy. We urge you to review this section, which will reduce the blast radius going forward. We’d like for you to continue to be a valuable member of the community and our top hacker, but for that, we require you to be mindful of the access that particular vulnerabilities give you. Being responsible and understanding the potential consequences of your actions is very important in this field. We hope you understand and will take this into consideration going forward. [0] https://hackerone.com/reports/745324 https://hackerone.com/reports/745324
  - tastroder 7y ago
    Not sure what exactly that changes. It's still a relatively basic vulnerability and they still school the reporter after changing ("clarifying") their policy [0]. I realize it's worded to not come across as a threat but I'm not sure why that was necessary either. It might have been out of scope according to some H1 guideline the reporter wasn't aware of but what the reporter did wasn't really out of the ordinary. https://hackerone.com/security/policy_versions?change=3624684 https://hackerone.com/security/policy_versions?change=362468...
    - shkkmo 7y ago
      > Not sure what exactly that changes. Tone and how you treat your reporters matters. The comment quoted by the person I responded to was edited to include this after they read the full report: >> Edit: This comment was based on an incomplete understanding of the specifics of the communication between H1 and the reporter. This assessment wasn't the most fair, and I probably should have read the full report before passing judgment. [0] You say: >I'm not sure why that was necessary either. It might have been out of scope according to some H1 guideline the reporter wasn't aware of but what the reporter did wasn't really out of the ordinary. Isn't it exactly the commonness of that practice that makes it clear it is important to take the time to educate your reporters and improve your policy? The amount of sensitive data was accessed increased the severity of the breach. HackerOne specifically acknowledges this as one of their planned courses of action to improve things going forward: >> As the community grows, HackerOne needs to ensure that HackerOne is reinforcing the best practices in bug bounty hunting. The HackerOne Community team will look to increase hacker education around delivering proof of critical severity vulnerabilities in case sensitive information has been accessed by the hacker. [0] https://arstechnica.com/information-technology/2019/12/hackerone-breach-lets-outside-hacker-read-customers-private-bug-reports/?comments=1&post=38352571#comment-38352571 https://arstechnica.com/information-technology/2019/12/hacke...
      - tastroder 7y ago
        Fair enough. I find it rather patronizing but I also kind of get your point. H1's gamification requires them to educate their users to some degree, sure. Although I find that far more problematic than some common practice. I'd prefer policy that reflects reality. "If you see usernames or reports, stop and report it" might help with the part of the user base that bought into the gamification but I'm really not sure how that helps responsible disclosure in general. If you're not a paid external security researcherm, of course you click on at least one report to confirm that the vulnerability is actually working and has meaningful impact. Plus, they're still working with curious humans here, not OWASP top 10 scanners. That's just like all those bug bounty programs including some phrase disallowing automated tools. Even for active participants of the platform that's completely unrealistic and introduces unnecessary uncertainty.
ryanlol 7y ago
Original ticket, the article is a waste of time: https://hackerone.com/reports/745324 https://hackerone.com/reports/745324
- tptacek 7y ago
  I agree, this is not a great article, tries to make a lot of drama out of what appears to be a really simple event, manages to contain less information than the actual HackerOne report, and has that weird coda of Katie Moussouris and the DoD program, which has nothing to do with this story.
  - MaxGabriel 7y ago
    Do you have any thoughts on their mitigations? I would like to protect against attacks like this, but their mitigations seem to have big drawbacks: > Bind Sessions to IP Addresses As they admit, "IPs... change for legitimate reasons", so it seems like most sites wouldn't want to roll out this protection, because it would randomly logout their users. I haven't tested this, but it seems like this would be pretty common on mobile networks from some googling. > Bind Sessions to Devices They say they will "investigate binding the session to a specific device"; is there a known good way to do this? I could imagine attempts to do this breaking legitimate use cases like Apple's Handoff between iOS and Mac, or just not adding much security. My instinct is that the admin functionality could be put run behind a VPN, and that would be a good defense against a HackerOne employee's credentials or sessions cookie being leaked.
    - codexon 7y ago
      For such a highly valuable website like hackerone, IP binding should be done, the extra security is worth the slight annoyance at having to relog when your IP changes.
tyingq 7y ago
Feels like they are trying to have it both ways. Complaining that the finder poked around too much while asserting that he had access to very little.
- jcims 7y ago
  Lots of bug bounty policies expressly state you should not access other customer information. E.g.: https://www.google.com/about/appsecurity/reward-program/#reporting https://www.google.com/about/appsecurity/reward-program/#rep... Sometimes that's not easy but slurping tons of data to demonstrate the scope of the vulnerability is rarely necessary from a technical perspective. That said, if your report is being ignored it becomes a very tempting avenue to get priority.
  - AGKyle 7y ago
    With our bug bounty program we also state that researchers should not access customer data or interrupt normal operation of the services. If their testing is believed to impede normal operation we can provide separate servers for testing purposes. We also provide a test account upon which researchers can use if they wish to attempt to modify or read private information. They should stick to that data and I'd encourage other bug bounty programs to do similar. In my eyes this researcher should've stopped as soon as they started seeing private data and reported it, it sounds as though they continued to read private information well after they realized it was private data they were viewing. I realize not every bug bounty program plays fair. We look specifically at our bug bounty triage team (via the platform we use) to make sure we are treating researchers fairly and that researchers are obeying the agreed upon rules. They're the neutral third party in our eyes. They keep us honest and researchers honest. At least that's how I approach it all.
    - jcims 7y ago
      That’s cool. It’s so important for bounty programs to have a systematic way to approach awards. The security researcher community overall is very cool, but there are definitely some assholes and bottom feeders out there that can get under your skin and introduce bias in your decisions.
trulyrandom 7y ago
It's stunning that HackerOne staff use their production credentials to reproduce security reports. Is there no internal instance of the HackerOne platform they can run their tests on?
staticassertion 7y ago
This isn't very interesting, at least no more interesting than any other disclosure that goes through H1. If you're not familiar with disclosures and communication via H1 maybe this all feels very odd or bad or something, idk. Looks fairly standard to me. Ultimately, to me, someone found a vulnerability, reported the vuln, and it was remediated within ~3 hours. There was no "breach", unless you consider every H1 report a breach? Having a repository of vulns is quite a scary thing though. I often wonder, with all of the "wontfix" and "too low impact to care" bugs chained together, how easy is it to own many of these customers?
- eterm 7y ago
  It used to be that wontfix / low impact stuff would still be publically disclosed. Responsible disclosure was the key principle. There shouldn't be a gap between "won't fix" and "Too bad to be made public". If a company is happy not to fix something, they shouldn't complain if it's published.
wizzwizz4 7y ago
This title is misleading. It let an outside attacker do this – past tense – due to a token leak; this isn't an ongoing thing, and the token was revoked so even that attacker can't do anything now.
user5994461 7y ago
>>> As haxta4ok00 suggested, one step was to bind authentication cookies to the IP address of the user it was issued to. Do NOT bind session cookies to an IP. It breaks usability on mobiles, they change networks quite often. What you can try to do instead is to associate the cookie to the country is user currently is in. It's available in the CF-IPCountry header if you use CloudFlare. This may also cause usability issues for frequent travelers or border workers. https://support.cloudflare.com/hc/en-us/articles/200168236-Configuring-Cloudflare-IP-Geolocation https://support.cloudflare.com/hc/en-us/articles/200168236-C...
- jsploit 7y ago
  Locking sessions to countries doesn't offer any security benefit - an attacker can quite trivially connect from an IP in any target country.
  - user5994461 7y ago
    Lock out the login page too so users can't login from countries you don't do business with, especially the actively hostiles ones (CN, RU, T1). It's simple and it's extremely effective. It benefits security immensely.
    - jsploit 7y ago
      I don't understand how it's anything beyond a minimal defense-in-depth measure. 1. Target leaks session cookie 2. Attacker uses VPN to connect from target's country with the leaked session cookie 3. Attacker's session is deemed valid
      - user5994461 7y ago
        Attackers usually don't know the country of the user. Even if they do, it's not as easy as it sounds to find a VPN or an open proxy in any country. If you're thinking of Tor, Tor is trivial to detect and block. I've been working in fintech companies and e-commerce, handling real money or wallets that could be stolen or emptied by a successful attacker. If you don't do defense in depth, users lose. One trivial example, the days after a new breach is published on Hacker News, there will be bots on the door attempting to brute force login with all these new email and password combinations. Any other question? I feel like I have a context to start writing a blog post on that.
jupp0r 7y ago
Do they have a bug bounty program?

82 points by louis-paul 7y ago

if a platform which stores information about current 0days in their system get's pwned by an OWASP top-10 it should be considered gross negligence on their part. this isn't the security researchers fault but HackerOne trying to spin the story to their advantage. Absolutely disgusting, but I wouldn't expect anything else from them. We should agree to a system that auto-pwns (takes offline) anything that has an OWASP top-10 in it. janit0r had the right idea when s/he/they took all those IoT devices offline. The Japanese did something similar (iirc in 2018). the top comment in the article nails it: > I'm not a fan of a vulnerability reporting platform giving someone grief for finding a vuln in THEIR platform. Of all orgs, HackerOne should understand the optics of how they communicate with a reporting party. Interrogating your voluntary reporting party with things like "why did you access so much data, you didn't need to" is just stupid, that's common exposure assessment practice for most in the industry. Your vuln was found and exploited either way. Your choices are two: 1. Honorable guy validates scope of access and reports it. 2. Less honorable guy pwns your shit. Come on, HackerOne. EDIT: there is so much we could do (programmatically) using .well-known/security.txt to drive automation for all kinds of things in addition to mere providing of a contact point to report vulns to.

shkkmo 7y ago
You should read the actual report [0]. HackerOne repeatedly thanks the hacker for the report and awards a 20k bounty. > Thank you for confirming you no longer have unauthorized access. As part of our investigation, we also want to make sure we have all the relevant information from you to ensure we’re capturing everything, even as we review our own logs / audit records. As such, we would appreciate your answers to a few questions to assist us. HackerOne ask a bunch of questions about what was accessed. > Again, thank you so much for responsibly reporting this issue to us. We really do appreciate it, and we thank you for your assistance with our investigation. Then later after awarding a 20k bounty: >To make it clear on how we believe these situations should be handled by hackers, we’ve added a clarifying section to our policy. We urge you to review this section, which will reduce the blast radius going forward. We’d like for you to continue to be a valuable member of the community and our top hacker, but for that, we require you to be mindful of the access that particular vulnerabilities give you. Being responsible and understanding the potential consequences of your actions is very important in this field. We hope you understand and will take this into consideration going forward. [0] https://hackerone.com/reports/745324 https://hackerone.com/reports/745324
- tastroder 7y ago
  Not sure what exactly that changes. It's still a relatively basic vulnerability and they still school the reporter after changing ("clarifying") their policy [0]. I realize it's worded to not come across as a threat but I'm not sure why that was necessary either. It might have been out of scope according to some H1 guideline the reporter wasn't aware of but what the reporter did wasn't really out of the ordinary. https://hackerone.com/security/policy_versions?change=3624684 https://hackerone.com/security/policy_versions?change=362468...
  - shkkmo 7y ago
    > Not sure what exactly that changes. Tone and how you treat your reporters matters. The comment quoted by the person I responded to was edited to include this after they read the full report: >> Edit: This comment was based on an incomplete understanding of the specifics of the communication between H1 and the reporter. This assessment wasn't the most fair, and I probably should have read the full report before passing judgment. [0] You say: >I'm not sure why that was necessary either. It might have been out of scope according to some H1 guideline the reporter wasn't aware of but what the reporter did wasn't really out of the ordinary. Isn't it exactly the commonness of that practice that makes it clear it is important to take the time to educate your reporters and improve your policy? The amount of sensitive data was accessed increased the severity of the breach. HackerOne specifically acknowledges this as one of their planned courses of action to improve things going forward: >> As the community grows, HackerOne needs to ensure that HackerOne is reinforcing the best practices in bug bounty hunting. The HackerOne Community team will look to increase hacker education around delivering proof of critical severity vulnerabilities in case sensitive information has been accessed by the hacker. [0] https://arstechnica.com/information-technology/2019/12/hackerone-breach-lets-outside-hacker-read-customers-private-bug-reports/?comments=1&post=38352571#comment-38352571 https://arstechnica.com/information-technology/2019/12/hacke...
    - tastroder 7y ago
      Fair enough. I find it rather patronizing but I also kind of get your point. H1's gamification requires them to educate their users to some degree, sure. Although I find that far more problematic than some common practice. I'd prefer policy that reflects reality. "If you see usernames or reports, stop and report it" might help with the part of the user base that bought into the gamification but I'm really not sure how that helps responsible disclosure in general. If you're not a paid external security researcherm, of course you click on at least one report to confirm that the vulnerability is actually working and has meaningful impact. Plus, they're still working with curious humans here, not OWASP top 10 scanners. That's just like all those bug bounty programs including some phrase disallowing automated tools. Even for active participants of the platform that's completely unrealistic and introduces unnecessary uncertainty.

ryanlol 7y ago

Original ticket, the article is a waste of time: https://hackerone.com/reports/745324 https://hackerone.com/reports/745324

tptacek 7y ago
I agree, this is not a great article, tries to make a lot of drama out of what appears to be a really simple event, manages to contain less information than the actual HackerOne report, and has that weird coda of Katie Moussouris and the DoD program, which has nothing to do with this story.
- MaxGabriel 7y ago
  Do you have any thoughts on their mitigations? I would like to protect against attacks like this, but their mitigations seem to have big drawbacks: > Bind Sessions to IP Addresses As they admit, "IPs... change for legitimate reasons", so it seems like most sites wouldn't want to roll out this protection, because it would randomly logout their users. I haven't tested this, but it seems like this would be pretty common on mobile networks from some googling. > Bind Sessions to Devices They say they will "investigate binding the session to a specific device"; is there a known good way to do this? I could imagine attempts to do this breaking legitimate use cases like Apple's Handoff between iOS and Mac, or just not adding much security. My instinct is that the admin functionality could be put run behind a VPN, and that would be a good defense against a HackerOne employee's credentials or sessions cookie being leaked.
  - codexon 7y ago
    For such a highly valuable website like hackerone, IP binding should be done, the extra security is worth the slight annoyance at having to relog when your IP changes.

tyingq 7y ago

Feels like they are trying to have it both ways. Complaining that the finder poked around too much while asserting that he had access to very little.

jcims 7y ago
Lots of bug bounty policies expressly state you should not access other customer information. E.g.: https://www.google.com/about/appsecurity/reward-program/#reporting https://www.google.com/about/appsecurity/reward-program/#rep... Sometimes that's not easy but slurping tons of data to demonstrate the scope of the vulnerability is rarely necessary from a technical perspective. That said, if your report is being ignored it becomes a very tempting avenue to get priority.
- AGKyle 7y ago
  With our bug bounty program we also state that researchers should not access customer data or interrupt normal operation of the services. If their testing is believed to impede normal operation we can provide separate servers for testing purposes. We also provide a test account upon which researchers can use if they wish to attempt to modify or read private information. They should stick to that data and I'd encourage other bug bounty programs to do similar. In my eyes this researcher should've stopped as soon as they started seeing private data and reported it, it sounds as though they continued to read private information well after they realized it was private data they were viewing. I realize not every bug bounty program plays fair. We look specifically at our bug bounty triage team (via the platform we use) to make sure we are treating researchers fairly and that researchers are obeying the agreed upon rules. They're the neutral third party in our eyes. They keep us honest and researchers honest. At least that's how I approach it all.
  - jcims 7y ago
    That’s cool. It’s so important for bounty programs to have a systematic way to approach awards. The security researcher community overall is very cool, but there are definitely some assholes and bottom feeders out there that can get under your skin and introduce bias in your decisions.

trulyrandom 7y ago

It's stunning that HackerOne staff use their production credentials to reproduce security reports. Is there no internal instance of the HackerOne platform they can run their tests on?

staticassertion 7y ago

This isn't very interesting, at least no more interesting than any other disclosure that goes through H1. If you're not familiar with disclosures and communication via H1 maybe this all feels very odd or bad or something, idk. Looks fairly standard to me. Ultimately, to me, someone found a vulnerability, reported the vuln, and it was remediated within ~3 hours. There was no "breach", unless you consider every H1 report a breach? Having a repository of vulns is quite a scary thing though. I often wonder, with all of the "wontfix" and "too low impact to care" bugs chained together, how easy is it to own many of these customers?

eterm 7y ago
It used to be that wontfix / low impact stuff would still be publically disclosed. Responsible disclosure was the key principle. There shouldn't be a gap between "won't fix" and "Too bad to be made public". If a company is happy not to fix something, they shouldn't complain if it's published.

wizzwizz4 7y ago

This title is misleading. It let an outside attacker do this – past tense – due to a token leak; this isn't an ongoing thing, and the token was revoked so even that attacker can't do anything now.

user5994461 7y ago

>>> As haxta4ok00 suggested, one step was to bind authentication cookies to the IP address of the user it was issued to. Do NOT bind session cookies to an IP. It breaks usability on mobiles, they change networks quite often. What you can try to do instead is to associate the cookie to the country is user currently is in. It's available in the CF-IPCountry header if you use CloudFlare. This may also cause usability issues for frequent travelers or border workers. https://support.cloudflare.com/hc/en-us/articles/200168236-Configuring-Cloudflare-IP-Geolocation https://support.cloudflare.com/hc/en-us/articles/200168236-C...

jsploit 7y ago
Locking sessions to countries doesn't offer any security benefit - an attacker can quite trivially connect from an IP in any target country.
- user5994461 7y ago
  Lock out the login page too so users can't login from countries you don't do business with, especially the actively hostiles ones (CN, RU, T1). It's simple and it's extremely effective. It benefits security immensely.
  - jsploit 7y ago
    I don't understand how it's anything beyond a minimal defense-in-depth measure. 1. Target leaks session cookie 2. Attacker uses VPN to connect from target's country with the leaked session cookie 3. Attacker's session is deemed valid
    - user5994461 7y ago
      Attackers usually don't know the country of the user. Even if they do, it's not as easy as it sounds to find a VPN or an open proxy in any country. If you're thinking of Tor, Tor is trivial to detect and block. I've been working in fintech companies and e-commerce, handling real money or wallets that could be stolen or emptied by a successful attacker. If you don't do defense in depth, users lose. One trivial example, the days after a new breach is published on Hacker News, there will be bots on the door attempting to brute force login with all these new email and password combinations. Any other question? I feel like I have a context to start writing a blog post on that.

jupp0r 7y ago

Do they have a bug bounty program?