Gnu GnuTLS up to 1.4.3 Certificates verify.c

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Gnu GnuTLS up to 1.4.3. It has been declared as problematic. Impacted is an unknown function of the file verify.c of the component Certificates. Executing a manipulation can lead to an unknown weakness. This vulnerability is registered as CVE-2006-4790. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Gnu GnuTLS up to 1.4.3 (Network Encryption Software). It has been declared as problematic. This vulnerability affects some unknown processing of the file verify.c of the component Certificates. As an impact it is known to affect integrity. CVE summarizes:

verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3, does not properly handle excess data in the digestAlgorithm.parameters field when generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents GnuTLS from correctly verifying X.509 and other certificates that use PKCS, a variant of CVE-2006-4339.

The bug was discovered 09/14/2006. The weakness was published 09/14/2006 by Daniel Bleichenbacher (Website). The advisory is available at redhat.com. This vulnerability was named CVE-2006-4790 since 09/13/2006. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 22724 (Debian DSA-1182-1 : gnutls11 - cryptographic weakness), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156242 (Oracle Enterprise Linux Update fo rGnuTLS (ELSA-2006:0680)).

Upgrading to version 1.4.4 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (28953), Tenable (22724), SecurityFocus (BID 20027†), OSVDB (28778†) and Secunia (SA21937†). Similar entries are available at VDB-1948, VDB-32667 and VDB-32657. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
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: Unknown
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22724
Nessus Name: Debian DSA-1182-1 : gnutls11 - cryptographic weakness
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57406
OpenVAS Name: Debian Security Advisory DSA 1182-1 (gnutls11)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: GnuTLS 1.4.4

Timelineinfo

09/13/2006 🔍
09/14/2006 +1 days 🔍
09/14/2006 +0 days 🔍
09/14/2006 +0 days 🔍
09/14/2006 +0 days 🔍
09/14/2006 +0 days 🔍
09/14/2006 +0 days 🔍
09/15/2006 +1 days 🔍
09/18/2006 +3 days 🔍
09/22/2006 +4 days 🔍
10/14/2006 +22 days 🔍
03/12/2015 +3071 days 🔍
06/16/2025 +3749 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: redhat.com
Researcher: Daniel Bleichenbacher
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-4790 (🔍)
GCVE (CVE): GCVE-0-2006-4790
GCVE (VulDB): GCVE-100-32290

OVAL: 🔍

X-Force: 28953
SecurityFocus: 20027 - GNUTLS PKCS RSA Signature Forgery Vulnerability
Secunia: 21937 - GnuTLS RSA Signature Forgery Vulnerability, Less Critical
OSVDB: 28778 - CVE-2006-4790 - Gnu - GnuTLS - Security Bypass Issue
SecurityTracker: 1016844
Vulnerability Center: 12723 - GnuTLS allows RSA Keys with Exponent 3 Signature Forging, Medium
Vupen: ADV-2006-3635

See also: 🔍

Entryinfo

Created: 03/12/2015 15:51
Updated: 06/16/2025 03:28
Changes: 03/12/2015 15:51 (77), 07/08/2019 16:24 (13), 06/16/2025 03:28 (18)
Complete: 🔍
Cache ID: 216:29D:103

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