CVE-2009-0845 Null dereference in n/a
Remote attackers can crash the Kerberos daemon via a null pointer dereference in SPNEGO handling, requiring SPNEGO to be enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-0845?
CVE-2009-0845 is a medium-severity vulnerability in Mit Kerberos 5, published on 27 Mar 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2009-0845?
It affects 2 products.
Products include Mit Kerberos, Mit Kerberos 5.
How do I fix CVE-2009-0845?
Upgrade to a fixed version.
Is CVE-2009-0845 being exploited?
There is no known exploitation of CVE-2009-0845 in the wild and no public exploit code.
Other vulnerabilities in Mit Kerberos 5
Sources
Also known as DEBIAN-CVE-2009-0845, GHSA-74gr-5fw9-9jj5.