Description
Integer signedness error in the gssrpc__svcauth_unix function in svc_auth_unix.c in the RPC library in MIT Kerberos 5 (krb5) 1.6.1 and earlier might allow remote attackers to execute arbitrary code via a negative length value.
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.1-5 | — |
| Debian 13 | krb5 | 1.6.dfsg.1-5 | — |
| Debian 12 | krb5 | 1.6.dfsg.1-5 | — |
| Debian 4.0 | krb5 | 1.4.4-7etch2 | DSA-1323-1 |
| Debian 3.1 | krb5 | 1.3.6-2sarge5 | DSA-1323-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | krb5 +4 | 1.5-26 | RHSA-2007:0562 |
| RHEL 4 | krb5 +4 | 1.3.4-49 | RHSA-2007:0562 |
| RHEL 3 | krb5 +4 | 1.2.7-66 | RHSA-2007:0384 |
| RHEL 2 | krb5 +4 | 1.2.2-47 | RHSA-2007:0384 |
Advisories 3
- RHSA-2007:0562 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0384 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1323-1 krb5 Debian Security (DSA / DLA) · Mar 9, 2026
References
- 20070920 VMSA-2007-0006 Critical security updates for all supported versions of VMware ESX Server, VMware Server, VMware Workstation, VMware ACE, and VMware Player mailing-list
- ADV-2007-2732 vdb-entry
- 25894 third-party-advisory
- 25801 third-party-advisory
- USN-477-1 vendor-advisory
- ADV-2007-3229 vdb-entry
- 20070629 TSLSA-2007-0021 - kerberos5 mailing-list
- 25911 third-party-advisory
- 25888 third-party-advisory
- oval:org.mitre.oval:def:11277 vdb-entry signature
- RHSA-2007:0384 vendor-advisory
- https://secure-support.novell.com/KanisaPlatform/Publishing/773/3248163_f.SAL_Public.html
- 25890 third-party-advisory
- ADV-2007-2337 vdb-entry
- kerberos-gssrpcsvcauthunix-bo(35085) vdb-entry
- APPLE-SA-2007-07-31 vendor-advisory
- ADV-2007-2491 vdb-entry
- 26228 third-party-advisory
- ADV-2010-1574 vdb-entry
- 26033 third-party-advisory
- GLSA-200707-11 vendor-advisory
- 25800 third-party-advisory
- SSRT100107 vendor-advisory
- 24657 vdb-entry
- 1018293 vdb-entry
- VU#365313 third-party-advisory
- DSA-1323 vendor-advisory
- 2007-0021 vendor-advisory
- http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-004.txt
- TA07-177A third-party-advisory
- SUSE-SA:2007:038 vendor-advisory
- 25870 third-party-advisory
- MDKSA-2007:137 vendor-advisory
- 26909 third-party-advisory
- https://issues.rpath.com/browse/RPL-1499
- 27706 third-party-advisory
- http://docs.info.apple.com/article.html?artnum=306172
- RHSA-2007:0562 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2007-004.txt
- 20070628 FLEA-2007-0029-1: krb5 krb5-workstation mailing-list
- 25159 vdb-entry
- 36597 vdb-entry
- 20070626 MITKRB5-SA-2007-004: kadmind multiple RPC lib vulnerabilities mailing-list
- 25814 third-party-advisory
- 25821 third-party-advisory
- 40346 third-party-advisory
- 26235 third-party-advisory
- oval:org.mitre.oval:def:7131 vdb-entry signature