Bash: Privilege escalation

Background

Bash is the standard GNU Bourne Again SHell.

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"