Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade RHEL:8 haproxy20 to version 0:2.0.19-2.el8 or higher.
This issue was patched in RHSA-2022:0114.
Note: Versions mentioned in the description apply only to the upstream haproxy20 package and not the haproxy20 package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.