Description
The xdr_nullstring function in lib/kadm5/kadm_rpc_xdr.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 does not verify whether '\0' characters exist as expected, which allows remote authenticated users to obtain sensitive information or cause a denial of service (out-of-bounds read) via a crafted string.
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 | 1.13.2+dfsg-5 | — |
| Debian 13 | krb5 | 1.13.2+dfsg-5 | — |
| Debian 12 | krb5 | 1.13.2+dfsg-5 | — |
| Debian 8 | krb5 | 1.12.1+dfsg-19+deb8u2 | DSA-3466-1 |
| Debian 7 | krb5 | 1.10.1+dfsg-5+deb7u7 | DSA-3466-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | krb5 | 1.8.3+dfsg-4squeeze11 | DLA-423-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | krb5 | 1.12+dfsg-2ubuntu5.4 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | krb5 +6 | 1.13.2-12.el7_2 | RHSA-2016:0532 |
| RHEL 6 | krb5 +6 | 1.10.3-42z1.el6_7 | RHSA-2016:0493 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | krb5 | 1.12.1-25.1 | SUSE-SU-2016:0429-1 |
| SLES 12 | krb5 | 1.12.1-25.1 | SUSE-SU-2016:0429-1 |
| SLES 11 SP4 | krb5 | 1.6.3-133.49.106.1 | SUSE-SU-2016:0430-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | krb5 | 1.12.1-25.1 | SUSE-SU-2016:0429-1 |
| SLES for SAP 12 | krb5 | 1.12.1-25.1 | SUSE-SU-2016:0429-1 |
| SLES for SAP 11 SP4 | krb5 | 1.6.3-133.49.106.1 | SUSE-SU-2016:0430-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | krb5 | 1.14-r1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | krb5-libs +5 | 1.13.2-12.el7_2 | ELSA-2016-0532 |
Advisories 8
- RHSA-2016:0532 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2016:0493 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- DLA-423-1 krb5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3466-1 krb5 - security update 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
- SUSE-SU-2016:0430-1 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0429-1 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-0532 Moderate: krb5 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 31, 2016
References
- DSA-3466 vendor-advisory
- 82801 vdb-entry
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- openSUSE-SU-2016:0406 vendor-advisory
- RHSA-2016:0493 vendor-advisory
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8341
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- 1034914 vdb-entry
- RHSA-2016:0532 vendor-advisory
- https://github.com/krb5/krb5/commit/df17a1224a3406f57477bcd372c61e04c0e5a5bb
- openSUSE-SU-2016:0501 vendor-advisory