Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-cfc2-wjcm-c8fm
No affected components available
Envoy, which Pomerium is based on, contains two authorization related vulnerabilities:
- CVE-2021-32777: incorrectly transform a URL containing a
#fragmentelement, causing a mismatch in path-prefix based authorization decisions. - CVE-2021-32779: incorrectly handle duplicate headers, dropping all but the last. This may lead to incorrect routing or authorization policy decisions.
Impact
With specially crafted requests, incorrect authorization or routing decisions may be made by Pomerium.
Patches
Pomerium v0.14.8 and v0.15.1 contain an upgraded envoy binary with these vulnerabilities patched.
Workarounds
- This issue can only be triggered when using path prefix based policy. Removing any such policies should provide mitigation.
References
envoy GSA CVE-2021-32777 envoy GSA CVE-2021-32779 envoy announcement
For more information
If you have any questions or comments about this advisory:
- Open an issue in pomerium/pomerium
- Email us at security@pomerium.com
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard