OS command injection in subversion (Alpine package)

1) OS command injection

EUVDB-ID: #VU7886

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9800

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 shell commands on the target system.

The weakness exists due to command injection flaw. A remote attacker (e.g., repository, proxy server) can return a specially crafted 'svn+ssh://' URL during 'checkout', 'export', 'update', and 'switch' commands and execute arbitrary shell commands with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

subversion (Alpine package): 1.8.4-r0 - 1.9.5-r1

External links

http://git.alpinelinux.org/aports/commit/?id=eceae12fdc59478d8577e129f7c7ff024e0fac0b
http://git.alpinelinux.org/aports/commit/?id=7bb81a1376cc08d7e60a7b33e4d6ac28d0a4df12
http://git.alpinelinux.org/aports/commit/?id=d1a2d86a899fff4752652cc14f5afd245cc48cb1
http://git.alpinelinux.org/aports/commit/?id=1b66f68d0ee2a0173c10a28c172b474054da1395
http://git.alpinelinux.org/aports/commit/?id=6b5c0b1298bf625e1193620fc216ce70be853b70
http://git.alpinelinux.org/aports/commit/?id=845354bcf96bfc6e277ccd71ff4923708d369c90
http://git.alpinelinux.org/aports/commit/?id=d91cbe7e6cd3b7309bbda987f8456be7c6acbce9

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.