gnu gnutls up to 1.0.16 cryptographic issue

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in gnu gnutls up to 1.0.16. This impacts an unknown function. Such manipulation leads to cryptographic issue. This vulnerability is listed as CVE-2009-2730. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in gnu gnutls up to 1.0.16 (Network Encryption Software) and classified as critical. Affected by this issue is an unknown part. The manipulation with an unknown input leads to a cryptographic issue vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. CVE summarizes:

libgnutls in GnuTLS before 2.8.2 does not properly handle a \0 character in a domain name in the subject s (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

The weakness was presented 08/12/2009 by Tomas Hoger (Website). The advisory is shared for download at rhn.redhat.com. This vulnerability is handled as CVE-2009-2730. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability scanner Nessus provides a plugin with the ID 67916 (Oracle Linux 4 / 5 : gnutls (ELSA-2009-1232)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165156 (SUSE Update for Multiple Packages (SUSE-SR:2010:004)).

Upgrading to version 1.0.17 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (52404), Tenable (67916), SecurityFocus (BID 35952†), Secunia (SA36496†) and SecurityTracker (ID 1022777†). See VDB-40214, VDB-51836, VDB-51835 and VDB-51834 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 67916
Nessus Name: Oracle Linux 4 / 5 : gnutls (ELSA-2009-1232)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66295
OpenVAS Name: Debian Security Advisory DSA 1935-1 (gnutls13 gnutls26)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: gnutls 1.0.17

Timelineinfo

08/04/2009 🔍
08/04/2009 +0 days 🔍
08/10/2009 +5 days 🔍
08/12/2009 +2 days 🔍
08/12/2009 +0 days 🔍
08/24/2009 +12 days 🔍
07/12/2013 +1418 days 🔍
03/18/2015 +614 days 🔍
03/24/2025 +3659 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: rhn.redhat.com
Researcher: Tomas Hoger
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2730 (🔍)
GCVE (CVE): GCVE-0-2009-2730
GCVE (VulDB): GCVE-100-49388

OVAL: 🔍

X-Force: 52404
SecurityFocus: 35952 - GnuTLS NULL Character CA SSL Certificate Validation Security Bypass Vulnerability
Secunia: 36496
SecurityTracker: 1022777
Vulnerability Center: 23265 - GNU GnuTLS < 2.8.2 '\\0\x27 Character in Domain Name Man-in-the-Middle Attack, High

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 03/24/2025 22:28
Changes: 03/18/2015 15:15 (64), 02/13/2017 10:21 (9), 08/14/2021 00:58 (4), 08/14/2021 01:12 (1), 12/29/2024 02:37 (17), 03/24/2025 22:28 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!