Description
The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.5 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted certificate.
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 | 4.4-3 | — |
| Debian 13 | libtasn1-6 | 4.4-3 | — |
| Debian 12 | libtasn1-6 | 4.4-3 | — |
| Debian 8 | libtasn1-6 | 4.2-3+deb8u1 | DSA-3256-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libtasn1-6 | 3.4-3ubuntu0.3 | USN-2604-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | libtasn1 +2 | 4.10-1.el7 | RHSA-2017:1860 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libtasn1 | 3.7-11.1 | SUSE-SU-2016:1601-1 |
| SLES 12 | gnutls | 3.2.15-11.1 | SUSE-SU-2015:1518-1 |
| SLES 12 | libtasn1 | 3.7-11.1 | SUSE-SU-2016:1601-1 |
| SLES 11 SP4 | libtasn1 | 1.5-1.34.1 | SUSE-SU-2016:1600-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libtasn1 | 3.7-11.1 | SUSE-SU-2016:1601-1 |
| SLES for SAP 12 | gnutls | 3.2.15-11.1 | SUSE-SU-2015:1518-1 |
| SLES for SAP 12 | libtasn1 | 3.7-11.1 | SUSE-SU-2016:1601-1 |
| SLES for SAP 11 SP4 | libtasn1 | 1.5-1.34.1 | SUSE-SU-2016:1600-1 |
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 | 4.10-1.el7 | ELSA-2017-1860 |
Advisories 8
- RHSA-2017:1860 Red Hat Security Advisory: libtasn1 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2604-1 libtasn1-3, libtasn1-6 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3256-1 libtasn1-6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1601-1 Security update for libtasn1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1600-1 Security update for libtasn1 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10414-1 libtasn1-4.9-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1518-1 Security update for gnutls SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2017-1860 Moderate: libtasn1 security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 7, 2017
References
- GLSA-201509-04 vendor-advisory
- 1032246 vdb-entry
- FEDORA-2015-7288 vendor-advisory
- RHSA-2017:1860 vendor-advisory
- 20150430 Heap overflow / invalid read in Libtasn1 before 4.5 (TFPA 005/2015) mailing-list
- DSA-3256 vendor-advisory
- [help-libtasn1] 20150429 GNU Libtasn1 4.5 released mailing-list
- openSUSE-SU-2016:1567 vendor-advisory
- MDVSA-2015:232 vendor-advisory
- openSUSE-SU-2015:1372 vendor-advisory
- http://packetstormsecurity.com/files/131711/libtasn1-Heap-Overflow.html
- 74419 vdb-entry
- openSUSE-SU-2016:1674 vendor-advisory
- USN-2604-1 vendor-advisory