VDB-227537 · CVE-2023-26937 · EUVD-2023-30728

Xpdf 4.04 goo/GString.cc GString::resize buffer overflow

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in Xpdf 4.04. This affects the function GString::resize of the file goo/GString.cc. The manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2023-26937. No exploit exists.

Detailsinfo

A vulnerability was found in Xpdf 4.04 (Document Reader Software). It has been rated as critical. This issue affects the function GString::resize of the file goo/GString.cc. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer Overflow vulnerability found in XPDF v.4.04 allows an attacker to cause a Denial of Service via GString::resize located in goo/GString.cc

The weakness was disclosed 04/27/2023. The advisory is shared at gist.github.com. The identification of this vulnerability is CVE-2023-26937 since 02/27/2023. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-30728). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Document Reader Software

Name

Xpdf

Version

4.04

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD 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: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/27/2023 🔍
04/26/2023 +58 days 🔍
04/27/2023 +0 days 🔍
11/12/2025 +930 days 🔍

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2023-26937 (🔍)
GCVE (CVE): GCVE-0-2023-26937
GCVE (VulDB): GCVE-100-227537
EUVD: 🔍

Entryinfo

Created: 04/27/2023 01:39
Updated: 11/12/2025 19:06
Changes: 04/27/2023 01:39 (39), 05/20/2023 16:56 (10), 11/12/2025 19:06 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.