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CVE-2009-0844

21
FAUCET Score

CVE-2009-0844 describes a denial-of-service vulnerability in the SPNEGO implementation of MIT Kerberos 5 versions 1.5 through 1.6.3, specifically within the get_input_token function. A remote attacker can exploit this by sending a crafted length value, leading to a buffer over-read that crashes the daemon and potentially exposes sensitive information. With a CVSS score of 5.8 (medium severity), this vulnerability has a network attack vector and medium attack complexity, resulting in partial impact to confidentiality and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5-1.6.3CPE matchmatch criteria
cpe:2.3:a:mit:kerberos:5-1.6.3:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:-:*:*:*:*:*:*:*
1.5CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.5:*:*:*:*:*:*:*
1.5.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.5.1:*:*:*:*:*:*:*
1.5.2CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.5.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.32%
Probability of exploitation in next 30 days
EPSS Percentile
90.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0432 is in the 87th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: krb5-0:1.6.1-31.el5_3.3
View patch

Vendor Advisories (1)

redhatCVE-2009-0844Important

krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-2009-001)

Apr 7, 2009

References

lists.apple.com / archives/security-announce/2009/May/msg00002.html
secunia.com / advisories/34594
secunia.com / advisories/34617
secunia.com / advisories/34622
secunia.com / advisories/34628
secunia.com / advisories/34630
secunia.com / advisories/34637
secunia.com / advisories/34640
secunia.com / advisories/34734
secunia.com / advisories/35074
security.gentoo.org / glsa/glsa-200904-09.xml
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6339
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9474
sunsolve.sun.com / search/document.do
support.apple.com / kb/HT3549
support.avaya.com / elmodocs2/security/ASA-2009-142.htm
support.novell.com / docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html
support.novell.com / docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html
redhat.com / archives/fedora-package-announce/2009-April/msg00205.html
redhat.com / archives/fedora-package-announce/2009-April/msg00206.html
web.mit.edu / kerberos/advisories/MITKRB5-SA-2009-001.txt
wiki.rpath.com / Advisories:rPSA-2009-0058
wiki.rpath.com / wiki/Advisories:rPSA-2009-0058
www-01.ibm.com / support/docview.wss
kb.cert.org / vuls/id/662091
US Government Resource
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2009-0408.html
securityfocus.com / archive/1/502526/100/0/threaded
securityfocus.com / archive/1/502546/100/0/threaded
securityfocus.com / bid/34408
securitytracker.com / id
ubuntu.com / usn/usn-755-1
us-cert.gov / cas/techalerts/TA09-133A.html
US Government Resource
vupen.com / english/advisories/2009/0960
vupen.com / english/advisories/2009/0976
vupen.com / english/advisories/2009/1057
vupen.com / english/advisories/2009/1106
vupen.com / english/advisories/2009/1297
vupen.com / english/advisories/2009/2248