Input validation error in GNU cpio

1) Input validation error

EUVDB-ID: #VU33721

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-1197

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

cpio 2.11, when using the --no-absolute-filenames option, allows local users to write to arbitrary files via a symlink attack on a file in an archive. <a href="http://cwe.mitre.org/data/definitions/61.html">CWE-61: UNIX Symbolic Link (Symlink) Following</a>

Mitigation

Install update from vendor's website.

Vulnerable software versions

cpio: 2.11

External links

http://advisories.mageia.org/MGASA-2015-0080.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:066
http://www.openwall.com/lists/oss-security/2015/01/07/5
http://www.openwall.com/lists/oss-security/2015/01/18/7
http://www.securityfocus.com/bid/71914
http://www.ubuntu.com/usn/USN-2906-1
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=774669
http://lists.gnu.org/archive/html/bug-cpio/2015-01/msg00000.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

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