GNU Libtasn1 up to 3.5 lib/element.c null pointer dereference

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.
3.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in GNU Libtasn1 up to 3.5 and classified as problematic. The affected element is the function asn1_write_value/asn1_read_value_type/_asn1_convert_integer in the library lib/element.c. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2014-3469. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in GNU Libtasn1 up to 3.5 and classified as problematic. This issue affects the function asn1_write_value/asn1_read_value_type/_asn1_convert_integer in the library lib/element.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

The (1) asn1_read_value_type and (2) asn1_read_value functions in GNU Libtasn1 before 3.6 allows context-dependent attackers to cause a denial of service (NULL pointer dereference and crash) via a NULL value in an ivalue argument.

The weakness was published 05/25/2014 as GNU Libtasn1 3.6 released as confirmed posting (Mailing List). It is possible to read the advisory at lists.gnu.org. The identification of this vulnerability is CVE-2014-3469 since 05/14/2014. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 78302 (Amazon Linux AMI : libtasn1 (ALAS-2014-359)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350370 (Amazon Linux Security Advisory for libtasn1: ALAS-2014-359).

Upgrading to version 3.6 eliminates this vulnerability. The upgrade is hosted for download at ftp.gnu.org. Applying a patch is able to eliminate this problem. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93538), Tenable (78302), SecurityFocus (BID 67748†), Secunia (SA58379†) and SecurityTracker (ID 1030313†). Similar entries are available at VDB-13414 and VDB-13413. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 78302
Nessus Name: Amazon Linux AMI : libtasn1 (ALAS-2014-359)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703056
OpenVAS Name: Debian Security Advisory DSA 3056-1 (libtasn1-3 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Libtasn1 3.6

Timelineinfo

05/14/2014 🔍
05/25/2014 +11 days 🔍
05/25/2014 +0 days 🔍
05/28/2014 +3 days 🔍
05/28/2014 +0 days 🔍
06/02/2014 +5 days 🔍
06/02/2014 +0 days 🔍
06/02/2014 +0 days 🔍
06/05/2014 +3 days 🔍
06/08/2014 +3 days 🔍
06/20/2021 +2569 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: GNU Libtasn1 3.6 released
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3469 (🔍)
GCVE (CVE): GCVE-0-2014-3469
GCVE (VulDB): GCVE-100-13415

OVAL: 🔍

X-Force: 93538 - GNU libtasn1 asn1_read_value_type() and asn1_read_value() denial of service, Medium Risk
SecurityFocus: 67748 - GNU Libtasn1 'asn1_read_value_type()' Function Denial of Service Vulnerability
Secunia: 58379 - libtasn1 Multiple Vulnerabilities, Less Critical
SecurityTracker: 1030313 - libtASN1 Multiple Bugs Let Remote Users Deny Service
Vulnerability Center: 44801 - GnuTLS <3.6 Remote DoS vulnerability in libtasn1 asn1_read_value_type(), Medium

See also: 🔍

Entryinfo

Created: 06/02/2014 21:38
Updated: 06/20/2021 14:31
Changes: 06/02/2014 21:38 (74), 05/30/2017 09:14 (16), 06/20/2021 14:31 (3)
Complete: 🔍
Cache ID: 216:BAA:103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!