Out-of-bounds read in Info-ZIP UnZip

1) Out-of-bounds read

EUVDB-ID: #VU33148

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-7696

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in Info-ZIP UnZip 6.0. A remote attacker can perform a denial of service (heap-based buffer over-read and application crash) or possibly execute arbitrary code via a crafted password-protected ZIP archive, possibly related to an Extra-Field size value.

Mitigation

Update to version 6.10b.

Vulnerable software versions

UnZip: 6.0

External links

http://www.debian.org/security/2015/dsa-3386
http://www.openwall.com/lists/oss-security/2015/09/07/4
http://www.openwall.com/lists/oss-security/2015/09/15/6
http://www.openwall.com/lists/oss-security/2015/09/21/6
http://www.openwall.com/lists/oss-security/2015/10/11/5
http://www.securityfocus.com/bid/76863
http://www.securitytracker.com/id/1034027
http://www.ubuntu.com/usn/USN-2788-1
http://www.ubuntu.com/usn/USN-2788-2

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.