Libtasn1 up to 4.4 _asn1_extract_der_octet memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Libtasn1 up to 4.4. This impacts the function _asn1_extract_der_octet. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2015-3622. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Libtasn1 up to 4.4. It has been rated as critical. Affected by this issue is the function _asn1_extract_der_octet. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The _asn1_extract_der_octet function in lib/decoding.c in GNU Libtasn1 before 4.5 allows remote attackers to cause a denial of service (out-of-bounds heap read) via a crafted certificate.

The weakness was shared 05/05/2015 (Website). The advisory is available at blog.fuzzing-project.org. This vulnerability is handled as CVE-2015-3622 since 04/30/2015. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 83308 (Debian DSA-3256-1 : libtasn1-6 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236420 (Red Hat Update for libtasn1 (RHSA-2017:1860)).

Upgrading to version 4.5 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19916.

The vulnerability is also documented in the databases at Tenable (83308), SecurityFocus (BID 74419†), SecurityTracker (ID 1032246†) and Vulnerability Center (SBV-50227†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 83308
Nessus Name: Debian DSA-3256-1 : libtasn1-6 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703256
OpenVAS Name: Debian Security Advisory DSA 3256-1 (libtasn1-6 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libtasn1 4.5
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

04/16/2015 🔍
04/30/2015 +14 days 🔍
04/30/2015 +0 days 🔍
04/30/2015 +0 days 🔍
05/05/2015 +5 days 🔍
05/05/2015 +0 days 🔍
05/06/2015 +1 days 🔍
05/11/2015 +5 days 🔍
05/12/2015 +1 days 🔍
05/19/2015 +7 days 🔍
05/10/2022 +2548 days 🔍

Sourcesinfo

Advisory: RHSA-2017:1860
Status: Confirmed

CVE: CVE-2015-3622 (🔍)
GCVE (CVE): GCVE-0-2015-3622
GCVE (VulDB): GCVE-100-75194

OVAL: 🔍

SecurityFocus: 74419 - GNU Libtasn1 'decoding.c' Heap Buffer Overflow Vulnerability
SecurityTracker: 1032246 - libtASN1 Heap Over-read in _asn1_extract_der_octet() Lets Remote Users Deny Service
Vulnerability Center: 50227 - GNU Libtasn1 before 4.5 Remote DoS via a Crafted Certificate, Medium

Entryinfo

Created: 05/06/2015 11:23
Updated: 05/10/2022 09:27
Changes: 05/06/2015 11:23 (77), 06/29/2017 07:16 (6), 05/10/2022 09:23 (3), 05/10/2022 09:27 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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