skeleton.c in yacc does not properly handle reduction of a rule with an empty right hand side, which allows context-dependent attackers to cause an out-of-bounds stack access when the yacc stack pointer points to the end of the stack.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
Official Statement from Red Hat (07/17/2008)
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2008-3196
The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.
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[openbsd-cvs] 20080708 CVS: cvs.openbsd.org: src
[openbsd-cvs] 20080708 Re: CVS: cvs.openbsd.org: src
Vulnerable software and versions