CVE-2019-18224

Public Exploit

Description

idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.40% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1 third party advisory release notes
https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8c third party advisory patch
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420 issue tracking exploit third party advisory
https://usn.ubuntu.com/4168-1/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html vendor advisory
https://www.debian.org/security/2020/dsa-4613 vendor advisory
https://seclists.org/bugtraq/2020/Feb/4 mailing list
https://security.gentoo.org/glsa/202003-63 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-18224?
CVE-2019-18224 has been scored as a critical severity vulnerability.
How to fix CVE-2019-18224?
To fix CVE-2019-18224, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18224 being actively exploited in the wild?
It is possible that CVE-2019-18224 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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