lib-src/movemail.c in movemail in emacs 22 and 23 allows local users to read, modify, or delete arbitrary mailbox files via a symlink attack, related to improper file-permission checks.
CVSS Severity (version 2.0):
Impact Subscore: 6.4
Exploitability Subscore: 3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Official Statement from Red Hat (04/06/2010)
Not vulnerable. This issues does not affect the versions of emacs or xemacs as shipped with Red Hat Enterprise Linux. The movemail utility in Red Hat Enterprise Linux does not have the setgid bit set, which is required for this flaw to be exploitable.
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Vulnerable software and versions