Heap-based buffer overflow in ytnef - CVE-2021-3404
Published: September 20, 2021
Vulnerability identifier: #VU56713
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3404
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the SwapWord() function in lib/ytnef.c. A remote attacker can trick the victim to open a specially crafted file, trigger a 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.
Affected software
ytnef
Gentoo Linux
net-mail/ytnef
Gentoo Linux
net-mail/ytnef
How to mitigate CVE-2021-3404
Install updates from vendor's website.
ytnef - update to 2.0
net-mail/ytnef - update to 2.0
net-mail/ytnef - update to 2.0