Description
The asn1_get_bit_der function in GNU Libtasn1 before 3.6 does not properly report an error when a negative bit length is identified, which allows context-dependent attackers to cause out-of-bounds access via crafted ASN.1 data.
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 | libtasn1-6 | 3.6-1 | — |
| Debian 13 | libtasn1-6 | 3.6-1 | — |
| Debian 12 | libtasn1-6 | 3.6-1 | — |
| Debian 7 | libtasn1-3 | 2.13-2+deb7u1 | DSA-3056-1 |
| Debian 6.0 | libtasn1-3 | 2.7-1+squeeze+2 | DLA-77-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libtasn1-6 | 3.4-3ubuntu0.1 | USN-2294-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | libtasn1 +2 | 3.3-5.el7_0 | RHSA-2014:0687 |
| RHEL 6 | libtasn1 +2 | 2.3-6.el6_5 | RHSA-2014:0596 |
| RHEL 6 | rhev-hypervisor6 | 6.5-20140624.0.el6ev | RHSA-2014:0815 |
| RHEL 5 | gnutls +2 | 1.4.1-16.el5_10 | RHSA-2014:0594 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libtasn1 | 4.9-1.3 | openSUSE-SU-2024:10414-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | libtasn1 +2 | 3.3-5.el7_0 | ELSA-2014-0687 |
Advisories 9
- RHSA-2014:0815 Red Hat Security Advisory: rhev-hypervisor6 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0687 Red Hat Security Advisory: libtasn1 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0596 Red Hat Security Advisory: libtasn1 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0594 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2294-1 libtasn1-3, libtasn1-6 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-77-1 libtasn1-3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3056-1 libtasn1-3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10414-1 libtasn1-4.9-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2014-0687 Moderate: libtasn1 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 23, 2014
References
- 60320 third-party-advisory
- DSA-3056 vendor-advisory
- http://git.savannah.gnu.org/cgit/libtasn1.git/commit/?id=1c3ccb3e040bf13e342ee60bc23b21b97b11923f
- http://www.novell.com/support/kb/doc.php?id=7015302
- 59057 third-party-advisory
- SUSE-SU-2014:0758 vendor-advisory
- http://support.f5.com/kb/en-us/solutions/public/15000/400/sol15423.html
- http://linux.oracle.com/errata/ELSA-2014-0596.html
- MDVSA-2015:116 vendor-advisory
- 59021 third-party-advisory
- 61888 third-party-advisory
- http://advisories.mageia.org/MGASA-2014-0247.html
- RHSA-2014:0815 vendor-advisory
- RHSA-2014:0596 vendor-advisory
- [help-libtasn1] 20140525 GNU Libtasn1 3.6 released mailing-list
- http://www.novell.com/support/kb/doc.php?id=7015303
- http://linux.oracle.com/errata/ELSA-2014-0594.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1102323
- 58591 third-party-advisory
- RHSA-2014:0687 vendor-advisory
- 58614 third-party-advisory
- SUSE-SU-2014:0788 vendor-advisory
- RHSA-2014:0594 vendor-advisory
- 60415 third-party-advisory
- 59408 third-party-advisory