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Gentoo GLSA 202107-11: OpenDoas Privilege Escalation Normal Threat

gentoo
Calendar Grey July 7, 2021
Dist Gentoo Esm H88
Enhance OpenDoas to mitigate privilege escalation vulnerabilities due to inadequate environment scrutiny, following recommendations from Gentoo's security advisory.
A vulnerability in OpenDoas could lead to privilege escalation.

Summary

OpenDoas does not properly filter the PATH variable from the resulting shell after escalating privileges.

Topics%20covered

Topics Covered

security advisory gentoo privilege escalation access control vulnerability insufficient filtering

Resolution

All OpenDoas users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/doas-6.8.1"

References

[ 1 ] CVE-2019-25016 https://nvd.nist.gov/vuln/detail/CVE-2019-25016

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202107-11
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: OpenDoas: Insufficient environment filtering
Date: July 07, 2021
Bugs: #767781
ID: 202107-11

Topics%20covered

Topics Covered

security advisory gentoo privilege escalation access control vulnerability insufficient filtering

Synopsis

A vulnerability in OpenDoas could lead to privilege escalation.

Background

OpenDoas allows users to run commands as other users.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/doas < 6.8.1 >= 6.8.1

Impact

===== A local attacker with control of a user's PATH variable could escalate privileges if that user uses OpenDoas with a poisoned PATH variable.

Workaround

There is no known workaround at this time.

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