#VU50157 Memory leak in privoxy - CVE-2021-20216

Vulnerability identifier: #VU50157

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20216

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
privoxy
Server applications / Web servers

Vendor: privoxy

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak during decompression. A remote attacker can send specially crafted request to the web server and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

privoxy: 3.0 - 3.0.30

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External links
https://seclists.org/oss-sec/2021/q1/91
https://www.privoxy.org/3.0.31/user-manual/whatsnew.html

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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.