GnuTLS up to 2.12 libtasn1 asn1_get_length_der X.509 Client Certificate numeric error

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability was found in GnuTLS up to 2.12 and classified as critical. This vulnerability affects the function asn1_get_length_der of the component libtasn1. Executing a manipulation as part of X.509 Client Certificate can lead to numeric error. This vulnerability is handled as CVE-2012-1569. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in GnuTLS up to 2.12 (Network Encryption Software). It has been declared as critical. This vulnerability affects the function asn1_get_length_der of the component libtasn1. The manipulation as part of a X.509 Client Certificate leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The asn1_get_length_der function in decoding.c in GNU Libtasn1 before 2.12, as used in GnuTLS before 3.0.16 and other products, does not properly handle certain large length values, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) or possibly have unspecified other impact via a crafted ASN.1 structure.

The weakness was released 03/19/2012 by Matthew Hall (mhall) with Mu Dynamics as not defined blog post (Website). The advisory is shared for download at blog.mudynamics.com. This vulnerability was named CVE-2012-1569 since 03/12/2012. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

A public exploit has been developed by Matthew Hall (mhall). It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 68502 (Oracle Linux 6 : libtasn1 (ELSA-2012-0427)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166830 (SUSE Enterprise Linux Security Update for gnutls (SUSE-SU-2014:0320-1)).

Upgrading to version 2.12 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 25245.

The vulnerability is also documented in the databases at X-Force (74166), Tenable (68502), SecurityFocus (BID 52668†), OSVDB (80258†) and Secunia (SA48397†). Entries connected to this vulnerability are available at VDB-4877, VDB-12504 and VDB-59889. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
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: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Matthew Hall (mhall)

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68502
Nessus Name: Oracle Linux 6 : libtasn1 (ELSA-2012-0427)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 71243
OpenVAS Name: Debian Security Advisory DSA 2440-1 (libtasn1-3)
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 2.12
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

03/12/2012 🔍
03/19/2012 +7 days 🔍
03/19/2012 +0 days 🔍
03/21/2012 +2 days 🔍
03/21/2012 +0 days 🔍
03/22/2012 +1 days 🔍
03/26/2012 +4 days 🔍
03/26/2012 +0 days 🔍
04/02/2012 +7 days 🔍
07/12/2013 +466 days 🔍
12/24/2024 +4183 days 🔍

Sourcesinfo

Advisory: blog.mudynamics.com
Researcher: Matthew Hall (mhall)
Organization: Mu Dynamics
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2012-1569 (🔍)
GCVE (CVE): GCVE-0-2012-1569
GCVE (VulDB): GCVE-100-4876

OVAL: 🔍
IAVM: 🔍

X-Force: 74166
SecurityFocus: 52668 - GNU Libtasn1 ASN1 Length DER Decoding Memory Corruption Vulnerability
Secunia: 48397 - GnuTLS libtasn1 ASN1 Length DER Decoding Vulnerability, Highly Critical
OSVDB: 80258
SecurityTracker: 1026829
Vulnerability Center: 34780 - GNU Libtasn1 Improper Handling of Large Values Allows Remote DoS via a Crafted ASN.1 Structure, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/22/2012 16:06
Updated: 12/24/2024 02:09
Changes: 03/22/2012 16:06 (91), 04/10/2017 17:58 (12), 03/22/2021 09:17 (2), 12/24/2024 02:09 (18)
Complete: 🔍
Cache ID: 216:E6F:103

Once again VulDB remains the best source for vulnerability data.

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