Buffer overflow in GNU cpio

1) Buffer overflow

EUVDB-ID: #VU33162

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2037

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The cpio_safer_name_suffix function in util.c in cpio 2.11 allows remote attackers to cause a denial of service (out-of-bounds write) via a crafted cpio file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cpio: 2.11

External links

http://www.debian.org/security/2016/dsa-3483
http://www.openwall.com/lists/oss-security/2016/01/19/4
http://www.openwall.com/lists/oss-security/2016/01/22/4
http://www.securityfocus.com/bid/82293
http://www.securitytracker.com/id/1035067
http://www.ubuntu.com/usn/USN-2906-1

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.