Vulnerability identifier: #VU32346
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:
privoxy
Server applications /
Web servers
Vendor: privoxy
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The client_host function in parsers.c in Privoxy before 3.0.24 allows remote attackers to cause a denial of service (invalid read and crash) via an empty HTTP Host header.
Mitigation
Install update from vendor's website.
Vulnerable software versions
privoxy: 3.0.21 - 3.0.23
External links
http://ijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/parsers.c?r1=1.302&r2=1.303
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176475.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176492.html
http://www.debian.org/security/2016/dsa-3460
http://www.openwall.com/lists/oss-security/2016/01/21/4
http://www.openwall.com/lists/oss-security/2016/01/22/3
http://www.privoxy.org/announce.txt
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.