Stack-based buffer overflow in asn1_der_decoding in libtasn1 before 4.4 allows remote…
Priority MEDIUM 53CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Partial Red Hat: 8 fixed, 2 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Stack-based buffer overflow in asn1_der_decoding in libtasn1 before 4.4 allows remote attackers to have unspecified impact via unknown vectors.
Why it matters now
EPSS 0.07746 94th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 8 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:* | 10.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* | 14.10 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:* | 20 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* | 21 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* | 22 | Vulnerable | Fedoraproject |
| cpe:2.3:a:gnu:libtasn1:*:*:*:*:*:*:*:* | up to 4.3 | Vulnerable | GNU |
- cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:* Versions 10.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* Versions 14.10 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:* Versions 20 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* Versions 21 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* Versions 22 Vulnerable ·Fedoraproject
- cpe:2.3:a:gnu:libtasn1:*:*:*:*:*:*:*:* Versions up to 4.3 Vulnerable ·GNU
Remediation
Red Hat 1 advisory
- RHSA-2017:1860 Released 2017-08-01 · Red Hat rating Moderatelibtasn1 security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) libtasn1-4.10-1.el7
- Red Hat Enterprise Linux Client Optional (v. 7) libtasn1-devel-4.10-1.el7, 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-devel-4.10-1.el7, libtasn1-tools-4.10-1.el7
- Red Hat Enterprise Linux Server (v. 7) libtasn1-4.10-1.el7, libtasn1-4.10-1.el7.ppc, libtasn1-devel-4.10-1.el7 +1
- Red Hat Enterprise Linux Server Optional (v. 7) libtasn1-tools-4.10-1.el7
- Red Hat Enterprise Linux Workstation (v. 7) libtasn1-4.10-1.el7, libtasn1-devel-4.10-1.el7
- Red Hat Enterprise Linux Workstation Optional (v. 7) libtasn1-tools-4.10-1.el7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Virtualization 3 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2017:1860 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2017:1860 |
Timeline
- 2026-10-02 Threatist record created from CVE-2015-2806
- 2026-10-03 Alias added: GHSA-72cq-2586-ch4w
References
Advisory 13
- MDVSA-2015:193
- GLSA-201509-04
- FEDORA-2015-5199
- USN-2559-1
- FEDORA-2015-5308
- FEDORA-2015-5390
- FEDORA-2015-5245
- [oss-security] 20150330 Re: Fw: GNU Libtasn1 4.4 released ( fixes stack overflow in asn1_der_decoding)
- RHSA-2017:1860
- FEDORA-2015-5114
- DSA-3220
- FEDORA-2015-5182
- [oss-security] 20150329 Fw: GNU Libtasn1 4.4 released ( fixes stack overflow in asn1_der_decoding)
Sources
- CVE-2015-2806 · CVE Program
- CVE-2015-2806 · NVD
- FIRST EPSS
- GHSA-72cq-2586-ch4w · GitHub Advisory Database · CC BY 4.0
- CVE-2015-2806 · Red Hat security data · CC BY 4.0
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