Double Free in ytnef - CVE-2021-3403
Published: September 20, 2021
Vulnerability identifier: #VU56712
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: CVE-2021-3403
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Yeraze (Randall Hand)
Affected software:
ytnef
ytnef
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a double free error within the TNEFSubjectHandler() function in lib/ytnef.c. A remote attacker can trick the victim to open a specially crafted file, trigger a double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-3403
Install update from vendor's website.