7-zip up to 18.03 7Z File Parser integer underflow

Summaryinfo

A vulnerability was found in 7-zip. It has been rated as critical. The affected element is an unknown function of the component 7Z File Parser. The manipulation leads to integer underflow. This vulnerability is documented as CVE-2023-31102. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in 7-zip (File Compression Software). This issue affects an unknown function of the component 7Z File Parser. The manipulation with an unknown input leads to a integer underflow vulnerability. Using CWE to declare the problem leads to CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Ppmd7.c in 7-Zip before 23.00 allows an integer underflow and invalid read operation via a crafted 7Z archive.

The weakness was released 08/23/2023 as ZDI-23-1165. The advisory is shared at zerodayinitiative.com. The identification of this vulnerability is CVE-2023-31102 since 04/24/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 314237 (Debian dla-4576 : p7zip - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 23.01 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at sourceforge.net. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (314237). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• File Compression Software

Name

• 7-zip

Version

• 3.13
• 4.20
• 4.23
• 4.24
• 4.25
• 4.26
• 4.26 Beta
• 4.27
• 4.28
• 4.29
• 4.30
• 4.31
• 4.32
• 4.33
• 4.34
• 4.35
• 4.36
• 4.37
• 4.38
• 4.39
• 4.40
• 4.41
• 4.42
• 4.43
• 4.44
• 4.45
• 4.46
• 4.47
• 4.48
• 4.49
• 4.50
• 4.51
• 4.52
• 4.53
• 4.54
• 4.55
• 4.56
• 15.14
• 16.00
• 18.03

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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