Libksba up to 1.3.2 BER Data ber-decoder.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Libksba up to 1.3.2. The affected element is an unknown function of the file ber-decoder.c of the component BER Data Handler. This manipulation causes input validation. This vulnerability is tracked as CVE-2016-4353. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Libksba up to 1.3.2 and classified as critical. Affected by this vulnerability is an unknown functionality of the file ber-decoder.c of the component BER Data Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

ber-decoder.c in Libksba before 1.3.3 does not properly handle decoder stack overflows, which allows remote attackers to cause a denial of service (abort) via crafted BER data.

The weakness was disclosed 06/13/2016 (Website). It is possible to read the advisory at security.gentoo.org. This vulnerability is known as CVE-2016-4353 since 04/29/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 91220 (Ubuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : libksba vulnerabilities (USN-2982-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196481 (Ubuntu Security Notification for Libksba Vulnerabilities (USN-2982-1)).

Upgrading to version 1.3.3 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91220). The entries VDB-87908, VDB-87909, VDB-87910 and VDB-87913 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91220
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : libksba vulnerabilities (USN-2982-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 58353
OpenVAS Name: Ubuntu Update for libksba USN-2982-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libksba 1.3.3
Patch: 07116a314f4dcd4d96990bbd74db95a03a9f650a

Timelineinfo

04/29/2016 🔍
05/17/2016 +18 days 🔍
05/18/2016 +1 days 🔍
06/13/2016 +26 days 🔍
06/13/2016 +0 days 🔍
06/14/2016 +1 days 🔍
08/23/2022 +2261 days 🔍

Sourcesinfo

Advisory: USN-2982-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4353 (🔍)
GCVE (CVE): GCVE-0-2016-4353
GCVE (VulDB): GCVE-100-87907
See also: 🔍

Entryinfo

Created: 06/14/2016 09:12
Updated: 08/23/2022 14:50
Changes: 06/14/2016 09:12 (62), 01/19/2019 16:26 (11), 08/23/2022 14:50 (6)
Complete: 🔍
Cache ID: 216:7BA:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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