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Use of Externally-Controlled Format String The advisory has been revoked - it doesn't affect any version of package cjose-devel  (opens in a new tab)

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EPSS
2.73% (85th percentile)

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  • Snyk IDSNYK-RHEL8-CJOSEDEVEL-1888692
  • published1 Nov 2021
  • disclosed22 Jul 2021
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Introduced: 22 Jul 2021

CVE-2021-32785  (opens in a new tab)
CWE-134  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cjose-devel package and not the cjose-devel package as distributed by RHEL.

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. When mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache (OIDCCacheEncrypt off, OIDCSessionType server-cache, OIDCCacheType redis), mod_auth_openidc wrongly performed argument interpolation before passing Redis requests to hiredis, which would perform it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing argument interpolation only once, using the hiredis API. As a workaround, this vulnerability can be mitigated by setting OIDCCacheEncrypt to on, as cache keys are cryptographically hashed before use when this option is enabled.