Vulnerability identifier: #VU46729

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: CVE-2020-25219

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libproxy
Other software / Other software solutions

Vendor: libproxy

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response composed of an infinite stream that lacks a newline character. This leads to stack exhaustion.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libproxy: 0.4.0 - 0.4.15

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External links
http://github.com/libproxy/libproxy/issues/134
http://lists.debian.org/debian-lts-announce/2020/09/msg00012.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.