#VU33419 Stack-based buffer overflow - CVE-2015-4645

Vulnerability identifier: #VU33419

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-2015-4645

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the read_fragment_table_4 function in unsquash-4.c when processing a crafted input, which triggers a stack-based buffer overflow. A remote unauthenticated attacker can trigger stack-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
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-July/162171.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-July/162226.html
https://www.securityfocus.com/bid/75272
https://bugzilla.redhat.com/show_bug.cgi?id=1234886
https://github.com/devttys0/sasquatch/pull/5
https://github.com/plougher/squashfs-tools/commit/f95864afe8833fe3ad782d714b41378e860977b1
https://security.gentoo.org/glsa/201701-73

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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.