OpenSSL up to 0.9.8b PKCS #1 v1.5 Signature Authentication cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in OpenSSL and classified as problematic. Affected by this issue is some unknown functionality of the component PKCS #1 v1.5 Signature Authentication. This manipulation causes cryptographic issue. The identification of this vulnerability is CVE-2006-4339. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenSSL (Network Encryption Software). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component PKCS #1 v1.5 Signature Authentication. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

OpenSSL before 0.9.7, 0.9.7 before 0.9.7k, and 0.9.8 before 0.9.8c, when using an RSA key with exponent 3, removes PKCS-1 padding before generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents OpenSSL from correctly verifying X.509 and other certificates that use PKCS #1.

The issue has been introduced in 12/23/1998. The weakness was shared 09/05/2006 by Daniel Bleichenbacher (Website). The advisory is shared at openssl.org. This vulnerability is known as CVE-2006-4339 since 08/24/2006. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2492 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 20055 (Solaris 10 (x86) : 119214-36 (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Solaris Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185039 (HP-UX Running BIND Remote Denial of Service Vulnerability (HPSBUX02219)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at openssl.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (28755), Tenable (20055), SecurityFocus (BID 19849†), OSVDB (28549†) and Secunia (SA38568†). The entries VDB-2544, VDB-2546, VDB-2883 and VDB-3653 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.7
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: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 20055
Nessus Name: Solaris 10 (x86) : 119214-36 (deprecated)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57360
OpenVAS Name: Debian Security Advisory DSA 1173-1 (openssl)
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: 🔍

Patch: openssl.org

Timelineinfo

12/23/1998 🔍
10/19/2005 +2492 days 🔍
08/24/2006 +309 days 🔍
09/05/2006 +12 days 🔍
09/05/2006 +0 days 🔍
09/05/2006 +0 days 🔍
09/05/2006 +0 days 🔍
09/05/2006 +0 days 🔍
09/07/2006 +1 days 🔍
09/10/2006 +3 days 🔍
01/13/2025 +6700 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: openssl.org
Researcher: Daniel Bleichenbacher
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-4339 (🔍)
GCVE (CVE): GCVE-0-2006-4339
GCVE (VulDB): GCVE-100-2509

OVAL: 🔍

CERT: 🔍
X-Force: 28755 - OpenSSL RSA exponent 3 security bypass, Medium Risk
SecurityFocus: 19849 - OpenSSL PKCS Padding RSA Signature Forgery Vulnerability
Secunia: 38568 - OpenOffice.org 3 Multiple Vulnerabilities, Highly Critical
OSVDB: 28549 - OpenSSL RSA Key PKCS #1 v1.5 Signature Forgery
SecurityTracker: 1016791
Vupen: ADV-2010-0366

See also: 🔍

Entryinfo

Created: 09/07/2006 12:30
Updated: 01/13/2025 10:57
Changes: 09/07/2006 12:30 (92), 04/27/2019 21:35 (5), 01/13/2025 10:57 (17)
Complete: 🔍
Cache ID: 216:A3F:103

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