Incorrect handling of H2 GOAWAY + SETTINGS frames
CVE-2021-39162

8.6HIGH

Key Information:

Vendor

Pomerium

Status
Pomerium
Vendor
CVE Published:
9 September 2021

What is CVE-2021-39162?

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, can abnormally terminate if an H/2 GOAWAY and SETTINGS frame are received in the same IO event. This can lead to a DoS in the presence of untrusted upstream servers. 0.15.1 contains an upgraded envoy binary with this vulnerability patched. If only trusted upstreams are configured, there is not substantial risk of this condition being triggered.

Affected Version(s)

pomerium >= 0.15.0, < 0.15.1

References

https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/...
x_refsource_MISC
https://github.com/pomerium/pomerium/security/advisories/...
x_refsource_CONFIRM
https://github.com/envoyproxy/envoy/security/advisories/G...
x_refsource_MISC

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.