OpenSSL up to 0.9.8e crypto/bn/bn_mont.c BN_from_montgomery information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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2.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in OpenSSL up to 0.9.8e. This affects the function BN_from_montgomery of the file crypto/bn/bn_mont.c. Such manipulation leads to information disclosure. This vulnerability is traded as CVE-2007-3108. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSL up to 0.9.8e (Network Encryption Software) and classified as problematic. Affected by this issue is the function BN_from_montgomery of the file crypto/bn/bn_mont.c. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

The BN_from_montgomery function in crypto/bn/bn_mont.c in OpenSSL 0.9.8e and earlier does not properly perform Montgomery multiplication, which might allow local users to conduct a side-channel attack and retrieve RSA private keys.

The bug was discovered 08/01/2007. The weakness was shared 05/13/2008 by Lucian Bello (Website). The advisory is shared for download at lists.debian.org. This vulnerability is handled as CVE-2007-3108 since 06/07/2007. The exploitation is known to be difficult. The attack needs to be approached locally. The successful exploitation needs a simple authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 17760 (OpenSSL < 0.9.8f Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Web Servers and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38595 (OpenSSL "SSL_get_shared_ciphers()" Off-By-One Buffer Overflow).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at lists.debian.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (35781), Tenable (17760), SecurityFocus (BID 25163†), OSVDB (37055†) and Secunia (SA31489†). The entry VDB-39001 is related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 2.9
VulDB Meta Temp Score: 2.6

VulDB Base Score: 2.9
VulDB Temp Score: 2.6
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 17760
Nessus Name: OpenSSL < 0.9.8f Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 61027
OpenVAS Name: Debian Security Advisory DSA 1571-1 (openssl)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: lists.debian.org

Timelineinfo

06/07/2007 🔍
08/01/2007 +55 days 🔍
08/01/2007 +0 days 🔍
08/01/2007 +0 days 🔍
08/07/2007 +6 days 🔍
08/13/2007 +6 days 🔍
08/28/2007 +14 days 🔍
10/04/2007 +37 days 🔍
05/13/2008 +222 days 🔍
05/20/2008 +7 days 🔍
08/13/2008 +85 days 🔍
01/04/2012 +1239 days 🔍
01/13/2025 +4758 days 🔍

Sourcesinfo

Product: openssl.org

Advisory: lists.debian.org
Researcher: Lucian Bello
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-3108 (🔍)
GCVE (CVE): GCVE-0-2007-3108
GCVE (VulDB): GCVE-100-3704

OVAL: 🔍

CERT: 🔍
X-Force: 35781
SecurityFocus: 25163 - OpenSSL Montgomery Exponentiation Side-Channel Local Information Disclosure Vulnerability
Secunia: 31489
OSVDB: 37055 - OpenSSL crypto/bn/bn_mont.c BN_from_montgomery Function Local RSA Key Disclosure
Vulnerability Center: 15939 - OpenSSL Encryption Function Vulnerability Allows Local Users to Retrieve RSA Private Key, Low
Vupen: ADV-2008-2362

See also: 🔍

Entryinfo

Created: 05/20/2008 09:43
Updated: 01/13/2025 03:54
Changes: 05/20/2008 09:43 (92), 10/22/2019 15:11 (1), 01/13/2025 03:54 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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