Libksba up to 1.3.3 _ksba_ber_parse_tl input validation

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7.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Libksba up to 1.3.3. This affects the function _ksba_ber_parse_tl. Such manipulation leads to input validation. This vulnerability is traded as CVE-2016-4579. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Libksba up to 1.3.3. Affected by this issue is the function _ksba_ber_parse_tl. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via unspecified vectors, related to the "returned length of the object from _ksba_ber_parse_tl."

The weakness was shared 06/13/2016 (Website). The advisory is available at ubuntu.com. This vulnerability is handled as CVE-2016-4579 since 05/11/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 91471 (Amazon Linux AMI : libksba (ALAS-2016-712)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux 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 1.3.4 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 (91471). The entries VDB-87907, VDB-87908, VDB-87909 and VDB-87910 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Libksba

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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 91471
Nessus Name: Amazon Linux AMI : libksba (ALAS-2016-712)
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 1.3.4
Patch: a7eed17a0b2a1c09ef986f3b4b323cd31cea2b64

Timelineinfo

05/11/2016 🔍
06/02/2016 +22 days 🔍
06/06/2016 +4 days 🔍
06/13/2016 +7 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-2016-4579 (🔍)
GCVE (CVE): GCVE-0-2016-4579
GCVE (VulDB): GCVE-100-87914
See also: 🔍

Entryinfo

Created: 06/14/2016 09:13
Updated: 08/23/2022 15:24
Changes: 06/14/2016 09:13 (61), 01/20/2019 13:22 (11), 08/23/2022 15:24 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.