CVE-2009-0847: mit kerberos Numeric Errors
Vulnerability summary
CVE-2009-0847 is a medium (CVSS 4.3) Numeric Errors vulnerability in mit kerberos. EPSS estimates a 2.77% chance of exploitation in the next 30 days, higher than 86.3% of scored vulnerabilities.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 09-04-2009PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
2.77%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.77% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- krb5< 1.6.dfsg.4~beta1-13
Mit1 product
- kerberos5-1.6.3
2 vendors · 2 products
References
39 links- support.apple.com/kb/HT3549X Refsource CONFIRM
- support.avaya.com/elmodocs2/security/ASA-2009-142.htmX Refsource CONFIRM
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6387VDB EntrySignatureX Refsource OVAL
Show all 39 references
- www-01.ibm.com/support/docview.wss?uid=swg21396120X Refsource CONFIRM
- 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.redhat.com/archives/fedora-package-announce/2009-April/msg00206.htmlVendor AdvisoryX Refsource FEDORA
- www.redhat.com/archives/fedora-package-announce/2009-April/msg00205.htmlVendor AdvisoryX Refsource FEDORA
- wiki.rpath.com/Advisories:rPSA-2009-0058X Refsource CONFIRM