Lynx GnuTLS cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Lynx. This vulnerability affects the function GnuTLS. The manipulation results in cryptographic issue. This vulnerability was named CVE-2012-5821. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in Lynx (Web Browser) (affected version unknown). Affected is the function GnuTLS. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, and integrity. CVE summarizes:

Lynx does not verify that the server s certificate is signed by a trusted certification authority, which allows man-in-the-middle attackers to spoof SSL servers via a crafted certificate, related to improper use of a certain GnuTLS function.

The weakness was presented 11/04/2012 (Website). The advisory is shared for download at mandriva.com. This vulnerability is traded as CVE-2012-5821 since 11/04/2012. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability scanner Nessus provides a plugin with the ID 66113 (Mandriva Linux Security Advisory : lynx (MDVSA-2013:101)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195353 (Ubuntu Security Notification for Lynx-cur Vulnerabilities (USN-1642-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (79930), Tenable (66113), SecurityFocus (BID 56795†) and Vulnerability Center (SBV-37573†). See VDB-54421 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
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: 66113
Nessus Name: Mandriva Linux Security Advisory : lynx (MDVSA-2013:101)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 841235
OpenVAS Name: Ubuntu Update for lynx-cur USN-1642-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/16/2012 🔍
11/04/2012 +19 days 🔍
11/04/2012 +0 days 🔍
11/04/2012 +0 days 🔍
11/04/2012 +0 days 🔍
12/10/2012 +36 days 🔍
04/20/2013 +131 days 🔍
03/24/2015 +703 days 🔍
12/19/2021 +2462 days 🔍

Sourcesinfo

Advisory: USN-1642-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-5821 (🔍)
GCVE (CVE): GCVE-0-2012-5821
GCVE (VulDB): GCVE-100-62868

OVAL: 🔍

X-Force: 79930
SecurityFocus: 56795 - Lynx Browser Certificate Verification Security Bypass Vulnerability
Vulnerability Center: 37573 - Lynx Spoofing of SSL Servers via a Crafted Certificate due to Improper Verification of Certificates, Medium

See also: 🔍

Entryinfo

Created: 03/24/2015 12:22
Updated: 12/19/2021 17:29
Changes: 03/24/2015 12:22 (65), 04/22/2017 12:56 (6), 12/19/2021 17:21 (3), 12/19/2021 17:29 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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