Title: 7-Zip ARJ File Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
7-Zip is a file-compression/decompression application written for the Microsoft Windows operating system.
7-Zip is prone to a stack-based buffer-overflow vulnerability.
A boundary condition can be exploited when handling ARJ blocks that are greater than 2600 bytes. A stack-based buffer overflow can be triggered when the application handles a specially crafted ARJ file.
Successful exploitation of this vulnerability will allow attackers to execute arbitrary code. Other attacks are also possible.
The vulnerability has been confirmed in 7-Zip 3.13, 3.30, 4.23, and 4.26 BETA; other versions may also be affected.
Affected Products:
- 7-Zip 7-Zip 3.13.0
- 7-Zip 7-Zip 3.30
- 7-Zip 7-Zip 4.23.0
- 7-Zip 7-Zip 4.26.0 BETA
References:
- 7-Zip: 7-Zip Home Page
- 7-Zip: Bug in LzmaDecodeSize.c was fixed
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