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Fencer Intel
medium 5.0

CVE-2012-1569 json

The asn1_get_length_der function in decoding.c in GNU Libtasn1 before 2.12, as used in GnuTLS before 3.0.16 and other products, does not pr…

published 2012-03-26 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-1587

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The asn1_get_length_der function in decoding.c in GNU Libtasn1 before 2.12, as used in GnuTLS before 3.0.16 and other products, does not properly handle certain large length values, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) or possibly have unspecified other impact via a crafted ASN.1 structure.

Patch / fix

  • gnutls RHEL 5 1.4.1-7.el5_8.2
  • gnutls-utils RHEL 5 1.4.1-7.el5_8.2
  • libtasn1 RHEL 6 2.3-3.el6_2.1
  • libtasn1-tools RHEL 6 2.3-3.el6_2.1
  • rhev-hypervisor6 RHEL 6 6.2-20120423.1.el6_2
  • rhev-hypervisor6-tools RHEL 6 6.2-20120423.1.el6_2

red hat advisories RHSA-2012:0428RHSA-2012:0427RHSA-2012:0531

  • gnutls openSUSE Tumbleweed 3.4.15-1.1

opensuse advisories openSUSE-SU-2024:10105-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-1569 updated cvss 5.0

libtasn1: DER decoding buffer overflow (GNUTLS-SA-2012-3, MU-201202-02)

  • Red Hat Enterprise Linux 4 gnutls Red Hat Enterprise Linux 6 mingw32-gnutls
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) gnutls 1.4.1-7.el5_8.2, gnutls-utils 1.4.1-7.el5_8.2 Red Hat Enterprise Linux Desktop (v. 5 client) gnutls 1.4.1-7.el5_8.2, gnutls-utils 1.4.1-7.el5_8.2
    fixed: vendor fix RHSA-2012:0428
  • Red Hat Enterprise Linux Desktop (v. 6) libtasn1 2.3-3.el6_2.1 Red Hat Enterprise Linux Desktop Optional (v. 6) libtasn1 2.3-3.el6_2.1, libtasn1-tools 2.3-3.el6_2.1 Red Hat Enterprise Linux HPC Node (v. 6) libtasn1 2.3-3.el6_2.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) libtasn1 2.3-3.el6_2.1, libtasn1-tools 2.3-3.el6_2.1 Red Hat Enterprise Linux Server (v. 6) libtasn1 2.3-3.el6_2.1 Red Hat Enterprise Linux Server Optional (v. 6) libtasn1 2.3-3.el6_2.1, libtasn1-tools 2.3-3.el6_2.1
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) libtasn1 2.3-3.el6_2.1 Red Hat Enterprise Linux Workstation Optional (v. 6) libtasn1 2.3-3.el6_2.1, libtasn1-tools 2.3-3.el6_2.1
    fixed: vendor fix RHSA-2012:0427
  • Red Hat RHEL Desktop Workstation (v. 5 client) gnutls 1.4.1-7.el5_8.2
    fixed: vendor fix RHSA-2012:0428
  • Red Hat RHEV Hypervisor for RHEL-6 rhev-hypervisor6 6.2-20120423.1.el6_2, rhev-hypervisor6-tools 6.2-20120423.1.el6_2
    fixed: vendor fix RHSA-2012:0531
  • Red Hat Enterprise Linux 7 libtasn1, libtasn1-tools
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.25% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • blog.mudynamics.com http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.