Fedora 26 update for cvs

1) OS Command Injection

EUVDB-ID: #VU29260

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-12836

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing characters in the URL of a remote repository within SSH client.  A remote attacker can trick the victim to use a specially crafted connection URL, inject and execute arbitrary OS commands on the client's system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 26

cvs: before 1.11.23-42.fc26

CPE2.3

• cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
• cpe:2.3:a:fedoraproject:cvs:*:*:*:*:*:fedora:*:*

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2017-e5a78c5ca9

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.