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Gentoo: GLSA 202105-34 Moderate: Bash Privilege Escalation Risk

gentoo
Calendar Grey May 26, 2021
Dist Gentoo Esm H88
To fix the privilege escalation vulnerability in Gentoo highlighted in GLSA 202105-34, update the Bash shell to the latest version by following the steps outlined
A vulnerability in Bash may allow users to escalate privileges.

Summary

It was discovered that Bash incorrectly dropped privileges by setting its effective UID to its real UID.

Topics%20covered

Topics Covered

security advisory moderate Gentoo gentoo privilege escalation security flaw normal severity bash escalation risk upgrades Bash

Resolution

All Bash users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/bash-5.0_p11-r1"

References

[ 1 ] CVE-2019-18276 https://nvd.nist.gov/vuln/detail/CVE-2019-18276

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202105-34
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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.

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Severity: Normal
Title: Bash: Privilege escalation
Date: May 26, 2021
Bugs: #702488
ID: 202105-34

Topics%20covered

Topics Covered

security advisory moderate Gentoo gentoo privilege escalation security flaw normal severity bash escalation risk upgrades Bash

Synopsis

A vulnerability in Bash may allow users to escalate privileges.

Background

Bash is the standard GNU Bourne Again SHell.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-shells/bash < 5.0_p11-r1 >= 5.0_p11-r1

Impact

===== A local attacker could possibly escalate privileges.

Workaround

There is no known workaround at this time.

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