GLSA 202105-34: Bash: Privilege escalation

Severity:normal
Title:Bash: Privilege escalation
Date:05/26/2021
Bugs: #702488
ID:202105-34

Synopsis

A vulnerability in Bash may allow users to escalate privileges.

Background

Bash is the standard GNU Bourne Again SHell.

Affected packages

Package Vulnerable Unaffected Architecture(s)
app-shells/bash < 5.0_p11-r1 >= 5.0_p11-r1 All supported architectures

Description

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

Impact

A local attacker could possibly escalate privileges.

Workaround

There is no known workaround at this time.

Resolution

All Bash users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-shells/bash-5.0_p11-r1"
    

References

Availability

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

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.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

Thank you!