#VU45426 Resource management error in Tor - CVE-2011-0016

Vulnerability identifier: #VU45426

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-0016

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Tor
Client/Desktop applications / Web browsers

Vendor: tor.eff.org

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha does not properly manage key data in memory, which might allow local users to obtain sensitive information by leveraging the ability to read memory that was previously used by a different process.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Tor: 0.0.2 - 0.2.2.20

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External links
https://archives.seul.org/or/announce/Jan-2011/msg00000.html
https://blog.torproject.org/blog/tor-02129-released-security-patches
https://secunia.com/advisories/42905
https://secunia.com/advisories/42907
https://www.debian.org/security/2011/dsa-2148
https://www.openwall.com/lists/oss-security/2011/01/18/7
https://www.securityfocus.com/bid/45832
https://www.securitytracker.com/id?1024980
https://www.vupen.com/english/advisories/2011/0131
https://www.vupen.com/english/advisories/2011/0132
https://gitweb.torproject.org/tor.git/blob/refs/heads/release-0.2.2:/ChangeLog
https://trac.torproject.org/projects/tor/ticket/2384
https://trac.torproject.org/projects/tor/ticket/2385

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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.