CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

A vulnerability was found in GNU Libtasn1 up to 4.7. It has been classified as problematic. Affected is the function _asn1_extract_der_octet in the library lib/decoding.c. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.8, when used without the ASN1_DECODE_FLAG_STRICT_DER flag, allows remote attackers to cause a denial of service (infinite recursion) via a crafted certificate.

The weakness was disclosed 05/05/2016 (Website). The advisory is available at lists.gnu.org. This vulnerability is traded as CVE-2016-4008 since 04/13/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 90856 (Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : libtasn1-3, libtasn1-6 vulnerability (USN-2957-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168912 (OpenSuSE Security Update for libtasn1 (openSUSE-SU-2016:1567-1)).

Upgrading to version 4.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (90856).

Productinfo

Vendor

• GNU

Name

• Libtasn1

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 90856
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : libtasn1-3, libtasn1-6 vulnerability (USN-2957-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 803425
OpenVAS Name: Fedora Update for libtasn1 FEDORA-2016-048
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libtasn1 4.8
Patch: a6e0a0b58f5cdaf4e9beca5bce69c09808cbb625

Timelineinfo

04/13/2016 🔍
05/05/2016 +22 days 🔍
05/05/2016 +0 days 🔍
05/07/2016 +2 days 🔍
07/29/2022 +2274 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-2957-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4008 (🔍)
OVAL: 🔍

Entryinfo

Created: 05/07/2016 09:26 AM
Updated: 07/29/2022 05:21 PM
Changes: 05/07/2016 09:26 AM (42), 11/19/2018 08:26 AM (28), 07/29/2022 05:14 PM (6), 07/29/2022 05:21 PM (1)
Complete: 🔍
Cache ID: 18:A96:40

Discussion

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