Libtiff libtiff/tif_lzw.c LZWDecode null pointer dereference

HistoryDiffrelatejsonxmlCTI

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.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Libtiff. This affects the function LZWDecode of the file libtiff/tif_lzw.c. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2023-2731. An attack has to be approached locally. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Libtiff (Image Processing Software) (version now known). It has been rated as problematic. This issue affects the function LZWDecode of the file libtiff/tif_lzw.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:

A NULL pointer dereference flaw was found in Libtiff's LZWDecode() function in the libtiff/tif_lzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or denial of service.

The weakness was shared 05/18/2023 as 548. It is possible to read the advisory at gitlab.com. The identification of this vulnerability is CVE-2023-2731 since 05/16/2023. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 240052 (TencentOS Server 4: libtiff (TSSA-2024:0785)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 9be22b639ea69e102d3847dca4c53ef025e9527b is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (240052) and EUVD (EUVD-2023-34192). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Image Processing Software

Name

Libtiff

License

open-source

Website

Product: http://www.libtiff.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 240052
Nessus Name: TencentOS Server 4: libtiff (TSSA-2024:0785)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 9be22b639ea69e102d3847dca4c53ef025e9527b

Timelineinfo

05/16/2023 🔍
05/18/2023 +2 days 🔍
05/18/2023 +0 days 🔍
12/19/2025 +945 days 🔍

Sourcesinfo

Product: libtiff.org

Advisory: 548
Status: Confirmed

CVE: CVE-2023-2731 (🔍)
GCVE (CVE): GCVE-0-2023-2731
GCVE (VulDB): GCVE-100-229319
EUVD: 🔍

Entryinfo

Created: 05/18/2023 09:17
Updated: 12/19/2025 00:57
Changes: 05/18/2023 09:17 (42), 06/10/2023 14:45 (11), 01/22/2025 21:18 (26), 06/17/2025 15:08 (2), 12/19/2025 00:57 (1)
Complete: 🔍
Cache ID: 216::103