VulnerabilityModified
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.
CRITICAL 9.8EPSS 3.71%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.71% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- gnu/libidn2
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420Exploit, Issue Tracking, Third Party Advisory
- https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8cPatch, Third Party Advisory
- https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1Release Notes, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/
- https://seclists.org/bugtraq/2020/Feb/4
- https://security.gentoo.org/glsa/202003-63
- https://usn.ubuntu.com/4168-1/
- https://www.debian.org/security/2020/dsa-4613
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420Exploit, Issue Tracking, Third Party Advisory
- https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8cPatch, Third Party Advisory
- https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1Release Notes, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/
- https://seclists.org/bugtraq/2020/Feb/4
- https://security.gentoo.org/glsa/202003-63
- https://usn.ubuntu.com/4168-1/
- https://www.debian.org/security/2020/dsa-4613
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.