Heap-based buffer overflow in Libidn2 - CVE-2019-18224
Published: October 30, 2019
Vulnerability identifier: #VU22429
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-2019-18224
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Libidn2
Libidn2
Detailed vulnerability 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 idn2_to_ascii_4i() function in lib/lookup.c when processing domain names. A remote attacker can trick the victim to visit a specially crafted website, 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.
How to mitigate CVE-2019-18224
Install updates from vendor's website.