PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
Fix
Patch, vendor advisory and mitigation references on NVD 10
- https://bugzilla.samba.org/show_bug.cgi?id=15203 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 Patch, Third Party Advisory
- https://web.mit.edu/kerberos/advisories/ Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.19/ Release Notes, Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=15203 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 Patch, Third Party Advisory
- https://web.mit.edu/kerberos/advisories/ Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.19/ Release Notes, Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · mit, heimdal_project, sambaNVD modified 2026-10-14 19:16
Affected (CPE criteria) 5
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*cpe:2.3:a:mit:kerberos_5:1.20:-:*:*:*:*:*:*cpe:2.3:a:mit:kerberos_5:1.20:beta1:*:*:*:*:*:*cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
References 23
- https://bugzilla.samba.org/show_bug.cgi?id=15203 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c Third Party Advisory
- https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202309-06
- https://security.gentoo.org/glsa/202310-06
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://security.netapp.com/advisory/ntap-20230223-0001/
- https://web.mit.edu/kerberos/advisories/ Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.19/ Release Notes, Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
- https://www.samba.org/samba/security/CVE-2022-42898.html Third Party Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=15203 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c Third Party Advisory
- https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202309-06
- https://security.gentoo.org/glsa/202310-06
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://security.netapp.com/advisory/ntap-20230223-0001/
- https://web.mit.edu/kerberos/advisories/ Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.19/ Release Notes, Vendor Advisory
- https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt Vendor Advisory
- https://www.samba.org/samba/security/CVE-2022-42898.html Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html