Libtasn1 up to 4.3 asn1_der_decoding memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Libtasn1 up to 4.3. This issue affects the function asn1_der_decoding. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in asn1_der_decoding in libtasn1 before 4.4 allows remote attackers to have unspecified impact via unknown vectors.

The weakness was presented 04/10/2015 (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2015-2806 since 03/30/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 82953 (Fedora 22 : mingw-gnutls-3.3.14-1.fc22 / mingw-libtasn1-4.4-1.fc22 (2015-5308)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 296002 (Solaris 11.3 Support Repository Update (SRU) 9.4.0 Missing).

Upgrading to version 4.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (82953). See 78889, 80607, 80673 and 80674 for similar entries.



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 82953
Nessus Name: Fedora 22 : mingw-gnutls-3.3.14-1.fc22 / mingw-libtasn1-4.4-1.fc22 (2015-5308)
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OpenVAS ID: 100675
OpenVAS Name: Fedora Update for libtasn1 FEDORA-2015-5199
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libtasn1 4.4
Patch: 4d4f992826a4962790ecd0cce6fbba4a415ce149


03/30/2015 🔍
03/30/2015 +0 days 🔍
04/08/2015 +9 days 🔍
04/10/2015 +2 days 🔍
04/10/2015 +0 days 🔍
04/11/2015 +1 days 🔍
04/11/2015 +0 days 🔍
04/21/2015 +10 days 🔍
04/22/2015 +1 days 🔍
05/03/2022 +2568 days 🔍


Advisory: RHSA-2017:1860
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-2806 (🔍)

SecurityTracker: 1032080 - libtASN1 Stack Overflow in asn1_ltostr() May Let Users Deny Service or Execute Arbitrary Code
Vulnerability Center: 49824 - libtasn1 before 4.4 Remote Code Execution in asn1_der_decoding, Critical
SecurityFocus: 73436 - GNU Libtasn1 'parser_aux.c' Stack Based Buffer Overflow Vulnerability

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Created: 04/12/2015 01:47 AM
Updated: 05/03/2022 06:03 PM
Changes: 04/12/2015 01:47 AM (68), 06/27/2017 03:22 AM (9), 05/03/2022 05:56 PM (5), 05/03/2022 06:03 PM (1)
Complete: 🔍


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