SB2023082513 - Multiple vulnerabilities in 7-Zip

Description

This security bulletin contains information about 2 vulnerabilities.

1) Integer underflow (CVE-ID: CVE-2023-31102)

CWE-ID: CWE-191 - Integer underflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer underflow when parsing 7Z files. A remote attacker can trick the victim to open a specially crafted archive, trigger an integer underflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Out-of-bounds write (CVE-ID: CVE-2023-40481)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when parsing SQFS files. A remote attacker can create a specially crafted archive, trick the victim into opening it, trigger an out-of-bounds write and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://www.zerodayinitiative.com/advisories/ZDI-23-1165/
• https://sourceforge.net/p/sevenzip/discussion/45797/thread/713c8a8269/
• https://www.zerodayinitiative.com/advisories/ZDI-23-1164/