Bug 2241004 (CVE-2023-31102)

Summary:	CVE-2023-31102 p7zip: 7Z File Parsing Integer Underflow Remote Code Execution Vulnerability
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	kaycoth, rtillery
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An integer underflow flaw is present in p7zip due to the improper validation of user-supplied data, which leads to remote code execution. This flaw allows an attacker to use a specially crafted file to trigger code execution, leading to a complete compromise of the system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2241102, 2241103
Bug Blocks:	2241005

Description Guilherme de Almeida Suckevicz 2023-09-27 16:33:51 UTC

This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of 7Z files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process.

References:
https://www.zerodayinitiative.com/advisories/ZDI-23-1165/
https://github.com/p7zip-project/p7zip/issues/224

Comment 2 Avinash Hanwate 2023-09-28 05:42:06 UTC

Created p7zip tracking bugs for this issue:

Affects: epel-all [bug 2241102]
Affects: fedora-all [bug 2241103]