Description
Stack-based buffer overflow in the svcauth_gss_validate function in lib/rpc/svc_auth_gss.c in the RPCSEC_GSS RPC library (librpcsecgss) in MIT Kerberos 5 (krb5) 1.4 through 1.6.2, as used by the Kerberos administration daemon (kadmind) and some third-party applications that use krb5, allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long string in an RPC message.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | krb5 | 1.6.dfsg.1-7 | — |
| Debian 13 | krb5 | 1.6.dfsg.1-7 | — |
| Debian 12 | krb5 | 1.6.dfsg.1-7 | — |
| Debian 4.0 | krb5 | 1.4.4-7etch4 | DSA-1367-1 |
| Debian 4.0 | librpcsecgss | 0.14-2etch1 | DSA-1368-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | krb5 +4 | 1.5-29 | RHSA-2007:0858 |
| RHEL 5 | nfs-utils-lib +1 | 1.0.8-7.2.z2 | RHSA-2007:0951 |
| RHEL 4 | nfs-utils-lib +1 | 1.0.6-8.z1 | RHSA-2007:0913 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.19.2-2.2 | openSUSE-SU-2024:10899-1 |
Advisories 6
- RHSA-2007:0951 Red Hat Security Advisory: nfs-utils-lib security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0858 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0913 Red Hat Security Advisory: nfs-utils-lib security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1367-1 krb5 - arbitrary code execution Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1368-1 librpcsecgss - arbitrary code execution Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10899-1 krb5-1.19.2-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- GLSA-200709-01 vendor-advisory
- FEDORA-2007-2017 vendor-advisory
- 20070912 ZDI-07-052: Multiple Kerberos Implementations Authentication Context Stack Overflow Vulnerability mailing-list
- 26713 third-party-advisory
- 26822 third-party-advisory
- 27043 third-party-advisory
- ADV-2008-0803 vdb-entry
- 26699 third-party-advisory
- SUSE-SR:2007:019 vendor-advisory
- ADV-2007-3060 vdb-entry
- 26680 third-party-advisory
- 26783 third-party-advisory
- 1018647 vdb-entry
- 26444 vdb-entry
- ADV-2007-3051 vdb-entry
- 27756 third-party-advisory
- 26684 third-party-advisory
- DSA-1367 vendor-advisory
- RHSA-2007:0951 vendor-advisory
- 26728 third-party-advisory
- 26700 third-party-advisory
- oval:org.mitre.oval:def:3162 vdb-entry signature
- https://bugzilla.redhat.com/show_bug.cgi?id=250973
- 26987 third-party-advisory
- 2007-0026 vendor-advisory
- 26676 third-party-advisory
- oval:org.mitre.oval:def:9379 vdb-entry signature
- APPLE-SA-2007-11-14 vendor-advisory
- http://docs.info.apple.com/article.html?artnum=307041
- USN-511-1 vendor-advisory
- 27081 third-party-advisory
- 20070906 rPSA-2007-0179-1 krb5 krb5-server krb5-services krb5-test krb5-workstation mailing-list
- SUSE-SR:2007:024 vendor-advisory
- 29270 third-party-advisory
- FEDORA-2008-1017 vendor-advisory
- 201319 vendor-advisory
- ADV-2007-3868 vdb-entry
- GLSA-200710-01 vendor-advisory
- RHSA-2007:0913 vendor-advisory
- [security-announce] 20070906 rPSA-2007-0179-2 krb5 krb5-server krb5-services krb5-test krb5-workstation mailing-list
- DSA-1368 vendor-advisory
- RHSA-2007:0858 vendor-advisory
- MDKSA-2007:181 vendor-advisory
- http://www.zerodayinitiative.com/advisories/ZDI-07-052.html
- 26691 third-party-advisory
- 26896 third-party-advisory
- http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2007-006.txt
- 26697 third-party-advisory
- 27146 third-party-advisory
- VU#883632 third-party-advisory
- 27643 third-party-advisory
- ADV-2007-3052 vdb-entry
- kerberos-rpcsecgss-bo(36437) vdb-entry
- 25534 vdb-entry
- TA07-319A third-party-advisory
- 26705 third-party-advisory
- 3092 third-party-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2007-396.htm
- 26792 third-party-advisory
- 29247 third-party-advisory