The asn1buf_imbed function in the ASN.1 decoder in MIT Kerberos 5 (aka krb5) 1.6.3, when…
Priority LOW 25CWE-189Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.02773 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2009-0847
- 2026-10-03 Alias added: GHSA-ph4p-rhxr-85rq
References
Advisory 11
Other 15
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047181.html
- ADV-2009-0960
- http://support.apple.com/kb/HT3549
- http://support.avaya.com/elmodocs2/security/ASA-2009-142.htm
- oval:org.mitre.oval:def:6387
- ADV-2009-2084
- http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5047180.html
- ADV-2009-0976
- http://www-01.ibm.com/support/docview.wss?uid=swg21396120
- ADV-2009-1057
- ADV-2009-2248
- http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0058
- ADV-2009-1297
- http://wiki.rpath.com/Advisories:rPSA-2009-0058
- ADV-2009-1106
More moos-ivp Kerberos vulnerabilities
- TI-2001-00539 Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows… CVSS 2.0HIGH 10.0
- TI-2000-00389 Buffer overflow in krb_rd_req function in Kerberos 4 and 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0
- TI-2004-00472 Multiple buffer overflows in krb5_aname_to_localname for MIT Kerberos 5 (krb5) 1.3.3 and… CVSS 2.0HIGH 10.0
- TI-2009-03997 Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the… CVSS 2.0HIGH 10.0
- TI-2000-00391 Buffer overflow in krshd in Kerberos 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0
- TI-2000-00390 Buffer overflow in krb425_conv_principal function in Kerberos 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0
Sources
- CVE-2009-0847 · CVE Program
- CVE-2009-0847 · NVD
- FIRST EPSS
- GHSA-ph4p-rhxr-85rq · GitHub Advisory Database · CC BY 4.0
- CVE-2009-0847 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences