Buffer overflow in GNU Libidn2
CVE-2019-18224
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.037 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1 (Third Party Advisory, Release Notes)
- github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8c (Patch, Third Party Advisory)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/4168-1/ (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html (vendor-advisory)
- www.debian.org/security/2020/dsa-4613 (vendor-advisory)
- seclists.org/bugtraq/2020/Feb/4 (mailing-list)
Frequently asked questions
- What is CVE-2019-18224?
- CVE-2019-18224 is a critical-severity vulnerability in GNU Libidn2, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-10-21.
- How severe is CVE-2019-18224?
- Critical severity. CVSS v3 base score is 9.8 out of 10.