VDB-227151 · CVE-2012-5340 · Exploit 23246

SumatraPDF/MuPDF PDF File lex_number integer 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.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in SumatraPDF and MuPDF. Affected by this issue is the function lex_number of the component PDF File Handler. Performing a manipulation results in integer overflow. This vulnerability is identified as CVE-2012-5340. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in SumatraPDF and MuPDF (Document Reader Software) (affected version unknown). This affects the function lex_number of the component PDF File Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

SumatraPDF 2.1.1/MuPDF 1.0 allows remote attackers to cause an Integer Overflow in the lex_number() function via a corrupt PDF file.

The weakness was released 04/22/2023 as 23246. It is possible to read the advisory at exploit-db.com. This vulnerability is uniquely identified as CVE-2012-5340 since 10/08/2012. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The commercial vulnerability scanner Qualys is able to test this issue with plugin 120735 (SumatraPDF Integer Overflow Vulnerability).

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 Exploit-DB (23246). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Document Reader Software

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/08/2012 🔍
04/22/2023 +3848 days 🔍
04/22/2023 +0 days 🔍
04/27/2025 +736 days 🔍

Sourcesinfo

Advisory: 23246
Status: Not defined

CVE: CVE-2012-5340 (🔍)
GCVE (CVE): GCVE-0-2012-5340
GCVE (VulDB): GCVE-100-227151
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/22/2023 08:53
Updated: 04/27/2025 04:11
Changes: 04/22/2023 08:53 (58), 09/12/2024 23:36 (16), 12/29/2024 06:35 (2), 04/27/2025 04:11 (3)
Complete: 🔍
Cache ID: 216::103