#VU38613 Out-of-bounds read in ytnef - CVE-2017-12142

Vulnerability identifier: #VU38613

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/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-2017-12142

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ytnef
Other software / Other software solutions

Vendor: Yeraze (Randall Hand)

Description

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

In ytnef 1.9.2, an invalid memory read vulnerability was found in the function SwapDWord in ytnef.c, which allows attackers to cause a denial of service via a crafted file.

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/49
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
https://somevulnsofadlab.blogspot.com/2017/07/ytnefinvalid-memory-read-in-swapdword.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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