9.8
CRITICAL
CVE-2019-18224
GNU Libidn2 DNS IDN2 Heap Buffer Overflow Vulnerability
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.

INFO

Published Date :

Oct. 21, 2019, 5:15 p.m.

Last Modified :

Nov. 7, 2023, 3:06 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2019-18224 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Gnu libidn2

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-18224 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-18224 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/
  • CVE Modified by [email protected]

    Mar. 30, 2020

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202003-63 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 03, 2020

    Action Type Old Value New Value
    Added Reference https://seclists.org/bugtraq/2020/Feb/4 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 01, 2020

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2020/dsa-4613 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 03, 2019

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html [No Types Assigned]
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 03, 2019

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 02, 2019

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 29, 2019

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/4168-1/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 24, 2019

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420 No Types Assigned https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420 Exploit, Issue Tracking, Third Party Advisory
    Changed Reference Type https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8c No Types Assigned https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8c Patch, Third Party Advisory
    Changed Reference Type https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1 No Types Assigned https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1 Release Notes, Third Party Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:gnu:libidn2:*:*:*:*:*:*:*:* versions up to (excluding) 2.1.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-18224 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-18224 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.86 }} -0.23%

score

0.88678

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability