CVE-2009-0845

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-03-27 · updated 2026-06-16
Weakness: CWE-20

Description

The spnego_gss_accept_sec_context function in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3, when SPNEGO is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via invalid ContextFlags data in the reqFlags field in a negTokenInit token.

Affected products

MIT Kerberos: 5-1.6.3
MIT Kerberos 5: 1.5, 1.5.1, 1.5.2, 1.5.3, 1.6, 1.6.1 (+1)

References

http://krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://secunia.com/advisories/34347
http://secunia.com/advisories/34594
http://secunia.com/advisories/34617
http://secunia.com/advisories/34622
http://secunia.com/advisories/34628
http://secunia.com/advisories/34630
http://secunia.com/advisories/34637
http://secunia.com/advisories/34640
http://secunia.com/advisories/34734
http://secunia.com/advisories/35074

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