Remote code execution in Tinyproxy

1) Double Free

EUVDB-ID: #VU79736

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2002-0847

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when handling HTTP requests. A remote attacker can send a specially crafted HTTP request to the server, trigger a double free error and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

tinyproxy: 1.3.0 - 1.5.0

CPE2.3

• cpe:2.3:a:tinyproxy:tinyproxy:1.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:tinyproxy:tinyproxy:1.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:tinyproxy:tinyproxy:1.3.2:*:*:*:*:*:*:*

External links

https://sourceforge.net/project/shownotes.php?release_id=88790
https://www.iss.net/security_center/static/9079.php
https://www.securityfocus.com/bid/4731
https://www.debian.org/security/2002/dsa-145

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.