GNU libpng up to 1.2.12 PNG Image pngset.c png_set_sPLT input validation

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.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in GNU libpng and classified as problematic. The impacted element is the function png_set_sPLT of the file pngset.c of the component PNG Image Handler. Performing a manipulation results in input validation. This vulnerability is identified as CVE-2006-5793. There is not any exploit available. It is recommended that the affected component be replaced with an alternative.

Detailsinfo

A vulnerability classified as critical has been found in GNU libpng (Image Processing Software). This affects the function png_set_sPLT of the file pngset.c of the component PNG Image Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

The sPLT chunk handling code (png_set_sPLT function in pngset.c) in libpng 1.0.6 through 1.2.12 uses a sizeof operator on the wrong data type, which allows context-dependent attackers to cause a denial of service (crash) via malformed sPLT chunks that trigger an out-of-bounds read.

The bug was discovered 11/07/2006. The weakness was released 11/15/2006 by Tavis Ormandy (@taviso) with Gentoo Linux Security Auditing Team (Website). It is possible to read the advisory at bugs.gentoo.org. This vulnerability is uniquely identified as CVE-2006-5793 since 11/08/2006. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67500 (Oracle Linux 3 / 4 / 5 : libpng (ELSA-2007-0356)), 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 156100 (Oracle Enterprise Linux Update for libpng (ELSA-2007-0356)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at libpng.org. The problem might be mitigated by replacing the product with as an alternative. The best possible mitigation is suggested to be establishing an alternative product. A possible mitigation has been published 2 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (30290), Tenable (67500), SecurityFocus (BID 21078†), OSVDB (30398†) and Secunia (SA25742†). Entry connected to this vulnerability is available at VDB-3084. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Image Processing Software

Vendor

• GNU

Name

• libpng

Version

• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.7rc1
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 67500
Nessus Name: Oracle Linux 3 / 4 / 5 : libpng (ELSA-2007-0356)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57702
OpenVAS Name: Slackware Advisory SSA:2006-335-03 libpng
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Alternative
Status: 🔍

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

Patch: libpng.org

Timelineinfo

11/07/2006 🔍
11/08/2006 +1 days 🔍
11/14/2006 +6 days 🔍
11/15/2006 +1 days 🔍
11/15/2006 +0 days 🔍
11/17/2006 +1 days 🔍
11/17/2006 +0 days 🔍
11/17/2006 +0 days 🔍
11/17/2006 +0 days 🔍
11/20/2006 +3 days 🔍
11/28/2006 +8 days 🔍
06/20/2007 +204 days 🔍
07/12/2013 +2214 days 🔍
07/11/2019 +2190 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: bugs.gentoo.org
Researcher: Tavis Ormandy (@taviso)
Organization: Gentoo Linux Security Auditing Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-5793 (🔍)
GCVE (CVE): GCVE-0-2006-5793
GCVE (VulDB): GCVE-100-2691

OVAL: 🔍

X-Force: 30290 - libpng png_set_sPLT function denial of service, Medium Risk
SecurityFocus: 21078 - The 'libpng' Graphics Library PNG_SET_SPLT Remote Denial of Service Vulnerability
Secunia: 25742 - Avaya Products libpng tRNS/sPLT Chunk Denial of Service, Less Critical
OSVDB: 30398 - libpng sPLT Chunk Handling DoS
SecurityTracker: 1017244
Vulnerability Center: 13157 - libpng 1.0.6-1.2.12 Denial of Service Via Malformed sPLT Chunks, Medium
Vupen: ADV-2006-4568

See also: 🔍

Entryinfo

Created: 11/20/2006 13:09
Updated: 07/11/2019 09:18
Changes: 11/20/2006 13:09 (110), 07/11/2019 09:18 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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