#VU33318 Input validation error in tinyproxy - CVE-2012-3505

Vulnerability identifier: #VU33318

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-3505

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
tinyproxy
Other software / Other software solutions

Vendor: tinyproxy

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (CPU and memory consumption) via (1) a large number of headers or (2) a large number of forged headers that trigger hash collisions predictably.

Mitigation
Update to version 1.8.4.

Vulnerable software versions

tinyproxy: 1.8.0 - 1.8.3

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External links
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=685281
https://secunia.com/advisories/50278
https://secunia.com/advisories/51074
https://www.debian.org/security/2012/dsa-2564
https://www.openwall.com/lists/oss-security/2012/08/17/3
https://www.openwall.com/lists/oss-security/2012/08/18/1
https://www.securitytracker.com/id?1027412
https://banu.com/bugzilla/show_bug.cgi?id=110
https://banu.com/bugzilla/show_bug.cgi?id=110#c2
https://bugs.launchpad.net/ubuntu/+source/tinyproxy/+bug/1036985

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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.