MEDIUM
krb5: incorrect length check inside ASN.1 decoder (MITKRB5-SA-2009-001)
Published Apr 9, 2009
4.3
MEDIUMCVSS 2.0
EPSS 2.77%
Description
The asn1buf_imbed function in the ASN.1 decoder in MIT Kerberos 5 (aka krb5) 1.6.3, when PK-INIT is used, allows remote attackers to cause a denial of service (application crash) via a crafted length value that triggers an erroneous malloc call, related to incorrect calculations with pointer arithmetic.
Affected products
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of krb5 as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.77% 0.02773
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.02773
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.77% (0.02773) | 85.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.77% (0.02773) | 84.42th | v5 (v2026.06.15) |
| Dec 23, 2025 | 20.29% (0.20287) | 95.32th | v4 (v2025.03.14) |
| Dec 1, 2025 | 12.83% (0.12828) | 93.80th | v4 (v2025.03.14) |
| Nov 9, 2025 | 11.09% (0.11090) | 93.13th | v4 (v2025.03.14) |
| Oct 26, 2025 | 25.12% (0.25117) | 95.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 23.40% (0.23404) | 95.49th | v4 (v2025.03.14) |
| Mar 29, 2025 | 38.95% (0.38954) | 95.88th | v4 (v2025.03.14) |
| Mar 21, 2025 | 23.40% (0.23404) | 95.52th | v4 (v2025.03.14) |
| Mar 17, 2025 | 18.55% (0.18552) | 94.76th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.96% (0.03965) | 91.93th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.57% (0.05568) | 92.04th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.93% (0.03932) | 85.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.93% (0.03932) | 84.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.93% (0.03932) | 67.70th | v2 (v2022.01.01) |
References (42)
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html vendor-advisoryx_refsource_APPLE
- http://marc.info/?l=bugtraq&m=124896429301168&w=2 vendor-advisoryx_refsource_HP
- http://secunia.com/advisories/34594 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34617 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34622 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34628 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34637 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34640 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/34734 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35074 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200904-09.xml vendor-advisoryx_refsource_GENTOO
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-256728-1 vendor-advisoryx_refsource_SUNALERT
- http://support.apple.com/kb/HT3549 x_refsource_CONFIRM
- http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm x_refsource_CONFIRM
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html x_refsource_MISC
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html x_refsource_MISC
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt x_refsource_CONFIRMVendor Advisory
- http://wiki.rpath.com/Advisories:rPSA-2009-0058 x_refsource_CONFIRM
- http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058 x_refsource_MISC
- http://www-01.ibm.com/support/docview.wss?uid=swg21396120 x_refsource_CONFIRM
- http://www.kb.cert.org/vuls/id/662091 third-party-advisoryx_refsource_CERT-VN
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:098 vendor-advisoryx_refsource_MANDRIVA
- http://www.securityfocus.com/archive/1/502526/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/502546/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/34408 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1021993 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/usn-755-1 vendor-advisoryx_refsource_UBUNTU
- http://www.us-cert.gov/cas/techalerts/TA09-133A.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.vupen.com/english/advisories/2009/0960 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/0976 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1057 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1106 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/1297 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/2084 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2009/2248 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2009-0847 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=491034 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-0847
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6387 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2009-0847
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.html vendor-advisoryx_refsource_FEDORA
- https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00206.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 9, 2009
Updated Aug 7, 2024
Reserved Mar 6, 2009
Link CVE-2009-0847
CISA Vulnrichment
Updated n/a