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Fencer Intel
medium 4.3

CVE-2015-3622 json

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…

published 2015-05-12 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-3664

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
32.9%
EPSS 32.9% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • libtasn1-6 Debian 14, Debian 13, Debian 12 4.4-3

debian advisories DEBIAN-CVE-2015-3622

  • libtasn1-6 Ubuntu 14.04 LTS 3.4-3ubuntu0.3

ubuntu advisories UBUNTU-CVE-2015-3622

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libtasn1 RHEL 7 4.10-1.el7
  • libtasn1-tools RHEL 7 4.10-1.el7

red hat advisories RHSA-2017:1860

  • libtasn1 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 3.7-11.1
  • libtasn1 SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 1.5-1.34.1
  • gnutls SLES for SAP 12, SLES 12, SLED 12 +1 more 3.2.15-11.1

suse advisories SUSE-SU-2016:1601-1SUSE-SU-2016:1600-1SUSE-SU-2015:1518-1

  • libtasn1 openSUSE Tumbleweed 4.9-1.3

opensuse advisories openSUSE-SU-2024:10414-1

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-2015-3622 updated cvss 5.9

libtasn1: heap overflow flaw in _asn1_extract_der_octet()

  • Red Hat Enterprise Linux 6 libtasn1, libtasn1-tools
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Virtualization 3 mingw-virt-viewer, mingw32-virt-viewer, mingw64-virt-viewer
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux Client (v. 7) libtasn1 4.10-1.el7 Red Hat Enterprise Linux Client Optional (v. 7) libtasn1-tools 4.10-1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) libtasn1 4.10-1.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libtasn1-tools 4.10-1.el7 Red Hat Enterprise Linux Server (v. 7) libtasn1 4.10-1.el7 Red Hat Enterprise Linux Server Optional (v. 7) libtasn1-tools 4.10-1.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) libtasn1 4.10-1.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libtasn1-tools 4.10-1.el7
    fixed: vendor fix RHSA-2017:1860

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

32.89% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • seclists.org http://seclists.org/fulldisclosure/2015/Apr/109 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/131711/libtasn1-Heap-Overflow.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.