CVE-2009-0845: mit kerberos Improper Input Validation

Modified

AliasesDEBIAN-CVE-2009-0845

Published 27-03-2009Last modified 07-08-2024

Vulnerability summary

CVE-2009-0845 is a medium (CVSS 5.0) Improper Input Validation vulnerability in mit kerberos. EPSS estimates a 5.63% chance of exploitation in the next 30 days, higher than 92.9% of scored vulnerabilities. 1 public exploit is recorded.

Priority

Routine

Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.0/10

010

Medium · v2.0 (NVD)

EPSS score

5.63%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 3 · Related 1

DSA-1766-1 OPENSUSE-SU-2024:10004-1 RHSA-2009:0408

Timeline

27-03-2009
PublishedVulnerability first disclosed.
07-08-2024
Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

v2.05.0

EPSS trend

Probability

5.63%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

No change 0.00 pp

From 5.63% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

referenceUnverified
Exploit Reference (src.mit.edu)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected systems

Version check

Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.

Mit2 products

kerberos5-1.6.3
kerberos_51.5 | 1.5.1 | 1.5.2 | 1.5.3 | 1.6 | 1.6.1 | 1.6.2

Debian1 product

krb5< 1.6.dfsg.4~beta1-13

2 vendors · 3 products

References

45 links

support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.htmlX Refsource MISC
www.securityfocus.com/archive/1/502526/100/0/threadedMailing ListX Refsource BUGTRAQ
www.kb.cert.org/vuls/id/662091Third Party AdvisoryX Refsource CERT VNUS Government Resource
www.securityfocus.com/bid/34257VDB EntryX Refsource BID
www.vupen.com/english/advisories/2009/0847VDB EntryX Refsource VUPENVendor Advisory
secunia.com/advisories/34347Third Party AdvisoryX Refsource SECUNIAVendor Advisory
support.apple.com/kb/HT3549X Refsource CONFIRM
support.avaya.com/elmodocs2/security/ASA-2009-142.htmX Refsource CONFIRM
src.mit.edu/fisheye/browse/krb5/trunk/src/lib/gssapi/spnego/spnego_mech.c?r1=21875&r2=22084X Refsource CONFIRMExploit
www.redhat.com/support/errata/RHSA-2009-0408.htmlVendor AdvisoryX Refsource REDHAT

Show all 45 references

secunia.com/advisories/34637Third Party AdvisoryX Refsource SECUNIA
secunia.com/advisories/34640Third Party AdvisoryX Refsource SECUNIA
secunia.com/advisories/35074Third Party AdvisoryX Refsource SECUNIAVendor Advisory
www.mandriva.com/security/advisories?name=MDVSA-2009:082Vendor AdvisoryX Refsource MANDRIVA
sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1Vendor AdvisoryX Refsource SUNALERT
security.gentoo.org/glsa/glsa-200904-09.xmlVendor AdvisoryX Refsource GENTOO
support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.htmlX Refsource MISC
www.vupen.com/english/advisories/2009/0976VDB EntryX Refsource VUPEN
lists.apple.com/archives/security-announce/2009/May/msg00002.htmlVendor AdvisoryX Refsource APPLE
www.ubuntu.com/usn/usn-755-1Vendor AdvisoryX Refsource UBUNTU
secunia.com/advisories/34630Third Party AdvisoryX Refsource SECUNIA
www-01.ibm.com/support/docview.wss?uid=swg21396120X Refsource CONFIRM
www.vupen.com/english/advisories/2009/1057VDB EntryX Refsource VUPEN
web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txtX Refsource CONFIRM
secunia.com/advisories/34617Third Party AdvisoryX Refsource SECUNIA
secunia.com/advisories/34628Third Party AdvisoryX Refsource SECUNIA
secunia.com/advisories/34734Third Party AdvisoryX Refsource SECUNIA
exchange.xforce.ibmcloud.com/vulnerabilities/49448VDB EntryX Refsource XF
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6449VDB EntrySignatureX Refsource OVAL
www.vupen.com/english/advisories/2009/2248VDB EntryX Refsource VUPENVendor Advisory
www.us-cert.gov/cas/techalerts/TA09-133A.htmlThird Party AdvisoryX Refsource CERTUS Government Resource
wiki.rpath.com/wiki/Advisories:rPSA-2009-0058X Refsource MISC
www.vupen.com/english/advisories/2009/1297VDB EntryX Refsource VUPEN
secunia.com/advisories/34622Third Party AdvisoryX Refsource SECUNIA
krbdev.mit.edu/rt/Ticket/Display.html?user=guest&pass=guest&id=6402X Refsource CONFIRM
www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.htmlVendor AdvisoryX Refsource FEDORA
www.securitytracker.com/id?1021867VDB EntryX Refsource SECTRACK
www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.htmlVendor AdvisoryX Refsource FEDORA
wiki.rpath.com/Advisories:rPSA-2009-0058X Refsource CONFIRM
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10044VDB EntrySignatureX Refsource OVAL
src.mit.edu/fisheye/changelog/krb5/?cs=22084X Refsource CONFIRMVendor Advisory
www.securityfocus.com/archive/1/502546/100/0/threadedMailing ListX Refsource BUGTRAQ
secunia.com/advisories/34594Third Party AdvisoryX Refsource SECUNIA
www.vupen.com/english/advisories/2009/1106VDB EntryX Refsource VUPEN
security-tracker.debian.org/tracker/CVE-2009-0845Advisory