It's frustrating, we reported a SQL injection vulnerability to the Vulcan Forged bug bounty program 6 months ago that let you pull master private keys and plaintext passwords. This vulnerability had a similar level of impact, but was rewarded with $2,000. (1/5)
Over the last year or so we've hacked on tons of Web2
crypto programs which are custodial wallet or are trusted mediums for people to interact with huge amounts of money, but the vulnerabilities are consistently paid <$5k when the *real* amount of risk is >$100m. (2/5)
Something to note is this isn't "speculative" impact, the vulnerabilities demonstrated clear access to user funds and since it's crypto there is a very real threat of someone actually draining the wallet. (3/5)
Smart contract vulnerabilities for platforms this size will normally pay, at the minimum, $100,000 for critical issues which lead to this level of loss of funds, so why are the web vulnerabilities being capped at $5,000 when there is the same level of impact? (4/5)
If these programs want to run a bug bounty program (which I think is great), I feel that more than anything they're going to have to increase rewards so that people take them seriously. (5/5)
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Client side path traversal is a really fun thing to explore for CSRF and XSS. Revisited an unexploitable blind SSRF which (1) required the authorization header to be sent and (2) passed the authorization header to the provided "url" parameter. This would be account takeover ...
... but, you can't directly CSRF a victim into sending an authorization bearer, therefore you can't trigger the CSRF and steal their token via the blind SSRF which forwarded the header. Luckily for us, the blind SSRF API call was via GET (/example?url=https:// + auth header) ...
... and this allows us to explore the rest of the app for potential client-side path traversal vulnerabilities. These are somewhat easy to find because they don't pose much risk by themselves. If a web app is large and ran via static JavaScript, you can find them pretty easy ...
Since it's 2021 I'd like to go ahead and disclose some bugs I wasn't able to talk about in 2020. These were issues that either got NDA'd or had long remediation timelines.
The following are quick summaries and proof of concepts for some of the simpler bugs:
1. IDOR on Apple via "X-Dsid" header allows attacker to retrieve name, credit card information, addresses, and various PII of any Apple users via DSID
Bounty: $25,000
Could create a "god cookie" which had access to all Apple customers name, address, phone, and billing info.
2. Reflected XSS/CSRF token bypass on SecureTransport 5.4 via URL parameters
Bounty: $7,000 and a comfy backpack from Axway :)
Could traverse to a "CSRF debug page" which would auto-submit a request with an appended CSRF token. Also vulnerable to (limited) XSS.