Buffer overflow in tor.eff Tor

1) Buffer overflow

EUVDB-ID: #VU44429

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-2778

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Tor: 0.0.2 - 0.2.2.33

CPE2.3

• cpe:2.3:a:tor_eff_org:tor:0.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:tor_eff_org:tor:0.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:tor_eff_org:tor:0.0.4:*:*:*:*:*:*:*

External links

https://www.debian.org/security/2011/dsa-2363
https://blog.torproject.org/blog/tor-02235-released-security-patches

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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