Description
The kg_accept_krb5 function in krb5/accept_sec_context.c in the GSS-API library in MIT Kerberos 5 (aka krb5) through 1.7.1 and 1.8 before 1.8.2, as used in kadmind and other applications, does not properly check for invalid GSS-API tokens, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an AP-REQ message in which the authenticator's checksum field is missing.
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 | heimdal | 1.4.0~git20100605.dfsg.1-1 | — |
| Debian 14 | krb5 | 1.8.1+dfsg-3 | — |
| Debian 13 | heimdal | 1.4.0~git20100605.dfsg.1-1 | — |
| Debian 13 | krb5 | 1.8.1+dfsg-3 | — |
| Debian 12 | heimdal | 1.4.0~git20100605.dfsg.1-1 | — |
| Debian 12 | krb5 | 1.8.1+dfsg-3 | — |
| Debian 5.0 | krb5 | 1.6.dfsg.4~beta1-5lenny4 | DSA-2052-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | java-1.5.0-ibm +4 | 1:1.5.0.12.2-1jpp.1.el6 | RHSA-2010:0873 |
| RHEL 6 | java-1.6.0-ibm +6 | 1:1.6.0.9.0-1jpp.4.el6 | RHSA-2010:0987 |
| RHEL 5 | java-1.4.2-ibm +6 | 1.4.2.13.7-1jpp.3.el5 | RHSA-2011:0152, RHSA-2010:0935 |
| RHEL 5 | java-1.5.0-ibm +7 | 1:1.5.0.12.2-1jpp.1.el5 | RHSA-2010:0807 |
| RHEL 5 | java-1.6.0-ibm +7 | 1:1.6.0.9.0-1jpp.3.el5 | RHSA-2010:0987 |
| RHEL 5 | java-1.6.0-sun +5 | 1:1.6.0.22-1jpp.1.el5 | RHSA-2010:0770 |
| RHEL 5 | krb5 +4 | 1.6.1-36.el5_5.4 | RHSA-2010:0423 |
| RHEL 4 | java-1.4.2-ibm +6 | 1.4.2.13.7-1jpp.3.el4 | RHSA-2011:0152, RHSA-2010:0935 |
| RHEL 4 | java-1.5.0-ibm +6 | 1:1.5.0.12.2-1jpp.1.el4 | RHSA-2010:0807 |
| RHEL 4 | java-1.6.0-ibm +6 | 1:1.6.0.9.0-1jpp.3.el4 | RHSA-2010:0987 |
| RHEL 4 | java-1.6.0-sun +5 | 1:1.6.0.22-1jpp.1.el4 | RHSA-2010:0770 |
| RHEL 4 | krb5 +4 | 1.3.4-62.el4_8.2 | RHSA-2010:0423 |
| RHEL 3 | krb5 +4 | 1.2.7-72 | RHSA-2010:0423 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Network Satellite 5 | java-1.6.0-ibm +1 | 1:1.6.0.9.1-1jpp.1.el5 | RHSA-2011:0880 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Advisories 10
- RHSA-2011:0880 Red Hat Security Advisory: Red Hat Network Satellite server IBM Java Runtime security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2011:0152 Red Hat Security Advisory: java-1.4.2-ibm security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0987 Red Hat Security Advisory: java-1.6.0-ibm security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0935 Red Hat Security Advisory: java-1.4.2-ibm security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0873 Red Hat Security Advisory: java-1.5.0-ibm security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0807 Red Hat Security Advisory: java-1.5.0-ibm security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0770 Red Hat Security Advisory: java-1.6.0-sun security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2010:0423 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-2052-1 krb5 - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10004-1 krb5-1.15-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- SUSE-SU-2012:0042 vendor-advisory
- 39818 third-party-advisory
- ADV-2011-0134 vdb-entry
- http://support.avaya.com/css/P8/documents/100114315
- 39784 third-party-advisory
- USN-940-1 vendor-advisory
- HPSBMU02799 vendor-advisory
- 20100518 MITKRB5-SA-2010-005 [CVE-2010-1321] GSS-API lib null pointer deref mailing-list
- MDVSA-2010:100 vendor-advisory
- TA11-201A third-party-advisory
- FEDORA-2010-8749 vendor-advisory
- RHSA-2010:0770 vendor-advisory
- 40685 third-party-advisory
- 40235 vdb-entry
- FEDORA-2010-8796 vendor-advisory
- ADV-2010-1574 vdb-entry
- oval:org.mitre.oval:def:7198 vdb-entry signature
- ADV-2010-1192 vdb-entry
- 39799 third-party-advisory
- ADV-2010-1196 vdb-entry
- SUSE-SR:2010:013 vendor-advisory
- SSRT100107 vendor-advisory
- 39849 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/cpuoct2010-175626.html
- RHSA-2010:0987 vendor-advisory
- 44954 third-party-advisory
- USN-940-2 vendor-advisory
- 42432 third-party-advisory
- oval:org.mitre.oval:def:7450 vdb-entry signature
- 39762 third-party-advisory
- RHSA-2011:0880 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/javacpuoct2010-176258.html
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-005.txt
- SUSE-SU-2012:0010 vendor-advisory
- RHSA-2010:0873 vendor-advisory
- SUSE-SR:2010:014 vendor-advisory
- ADV-2010-1177 vdb-entry
- http://www.vmware.com/security/advisories/VMSA-2011-0003.html
- 42974 third-party-advisory
- ADV-2010-3112 vdb-entry
- FEDORA-2010-8805 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpujuly2011-313328.html
- TA10-287A third-party-advisory
- 43335 third-party-advisory
- DSA-2052 vendor-advisory
- RHSA-2010:0423 vendor-advisory
- SUSE-SR:2010:019 vendor-advisory
- ADV-2010-1882 vdb-entry
- RHSA-2011:0152 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpujan2011-194091.html
- 20110211 VMSA-2011-0003 Third party component updates for VMware vCenter Server, vCenter Update Manager, ESXi and ESX mailing-list
- 40346 third-party-advisory
- oval:org.mitre.oval:def:11604 vdb-entry signature
- 41967 third-party-advisory
- RHSA-2010:0807 vendor-advisory
- RHSA-2010:0935 vendor-advisory
- 64744 vdb-entry
- ADV-2010-1222 vdb-entry
- ADV-2010-1193 vdb-entry