Vulnerability identifier: #VU34853
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
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 perform a denial of service (DoS) attack.
The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote servers to cause a denial of service (assertion failure and application exit) via a malformed HS descriptor.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Tor: 0.2.6.1 - 0.2.6.6
External links
http://openwall.com/lists/oss-security/2015/04/06/5
http://trac.torproject.org/projects/tor/ticket/15601
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.