#VU25457 Path traversal in libslirp - CVE-2020-7211

Vulnerability identifier: #VU25457

Vulnerability risk: Low

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

CVE-ID: CVE-2020-7211

CWE-ID: CWE-22

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
libslirp
Universal components / Libraries / Libraries used by multiple products

Vendor: Freedesktop.org

Description

The vulnerability allows an  attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within tftp.c in libslirp. A remote attacker can send a specially crafted TFPT request and read arbitrary files on the Windows system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libslirp: 4.1.0

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External links
https://www.openwall.com/lists/oss-security/2020/01/17/2
https://gitlab.freedesktop.org/slirp/libslirp/commit/14ec36e107a8c9af7d0a80c3571fe39b291ff1d4
https://security-tracker.debian.org/tracker/CVE-2020-7211

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.