Detections
Analytics
Amazon Linux AMI : libidn2 (ALAS-2019-1327)
critical Nessus Plugin ID 132322
Language:
Synopsis
The remote Amazon Linux AMI host is missing a security update.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. (CVE-2019-18224)GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels.
This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.(CVE-2019-12290)
Solution
Run 'yum update libidn2' to update your system.See Also
Plugin Details
Severity: Critical
ID: 132322
File Name: ala_ALAS-2019-1327.nasl
Version: 1.5
Type: local
Agent: unix
Published: 12/20/2019
Updated: 4/2/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 5.9
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2019-18224
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:libidn2, p-cpe:/a:amazon:linux:idn2, p-cpe:/a:amazon:linux:libidn2-devel, p-cpe:/a:amazon:linux:libidn2-debuginfo, cpe:/o:amazon:linux
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 12/19/2019
Vulnerability Publication Date: 10/21/2019
Reference Information
CVE: CVE-2019-12290, CVE-2019-18224
ALAS: 2019-1327