#VU38612 Heap-based buffer overflow in ytnef - CVE-2017-12141

Vulnerability identifier: #VU38612

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-2017-12141

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ytnef
Other software / Other software solutions

Vendor: Yeraze (Randall Hand)

Description

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

The vulnerability exists due to a boundary error in In ytnef 1.9.2, a heap-based buffer overflow vulnerability was found in the function TNEFFillMapi in ytnef.c, which. A remote attacker can use a crafted 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
Install update from vendor's website.

Vulnerable software versions

ytnef: 1.9.2

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External links
https://github.com/Yeraze/ytnef/issues/50
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
https://somevulnsofadlab.blogspot.com/2017/07/ytnefheap-buffer-overflow-in.html
https://usn.ubuntu.com/3667-1/

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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.