#VU31408 OS Command Injection in Mercurial - CVE-2017-1000116

Published: 2017-10-05 | Updated: 2020-07-18

Vulnerability identifier: #VU31408

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-1000116

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mercurial
Client/Desktop applications / Other client software

Vendor: Mercurial

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Mercurial prior to 4.3 did not adequately sanitize hostnames passed to ssh, leading to possible shell-injection attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Mercurial: 4.0 - 4.2.3

External links
https://www.debian.org/security/2017/dsa-3963
https://www.securityfocus.com/bid/100290
https://access.redhat.com/errata/RHSA-2017:2489
https://security.gentoo.org/glsa/201709-18
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.3_.2F_4.3.1_.282017-08-10.29

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.