#VU33258 Heap-based buffer overflow in ZZIPlib - CVE-2017-5976

Vulnerability identifier: #VU33258

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-5976

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ZZIPlib
Universal components / Libraries / Libraries used by multiple products

Vendor: zziplib.sourceforge.net

Description

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

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the zzip_mem_entry_extra_block function in memdisk.c in zziplib 0.13.62. A remote attacker can use a crafted ZIP file. to trigger heap-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Update to version 0.13.63.

Vulnerable software versions

ZZIPlib: 0.13.62

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External links
https://www.debian.org/security/2017/dsa-3878
https://www.openwall.com/lists/oss-security/2017/02/14/3
https://www.securityfocus.com/bid/96268
https://blogs.gentoo.org/ago/2017/02/09/zziplib-heap-based-buffer-overflow-in-zzip_mem_entry_extra_block-memdisk-c/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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