Detections
Analytics
Amazon Linux 2 : openssl11 (ALAS-2024-2564)
medium Nessus Plugin ID 200379
Language:
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of openssl11 installed on the remote host is prior to 1.1.1g-12. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2564 advisory.Issue summary: Some non-default TLS server configurations can cause unboundedmemory growth when processing TLSv1.3 sessions
Impact summary: An attacker may exploit certain server configurations to triggerunbounded memory growth that would lead to a Denial of Service
This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option isbeing used (but not if early_data support is also configured and the defaultanti-replay protection is in use). In this case, under certain conditions, thesession cache can get into an incorrect state and it will fail to flush properlyas it fills. The session cache will continue to grow in an unbounded manner. Amalicious client could deliberately create the scenario for this failure toforce a Denial of Service. It may also happen by accident in normal operation.
This issue only affects TLS servers supporting TLSv1.3. It does not affect TLSclients.
The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL1.0.2 is also not affected by this issue. (CVE-2024-2511)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update openssl11' to update your system.See Also
https://alas.aws.amazon.com/AL2/ALAS-2024-2564.html
Plugin Details
Severity: Medium
ID: 200379
File Name: al2_ALAS-2024-2564.nasl
Version: 1.1
Type: local
Agent: unix
Published: 6/12/2024
Updated: 6/12/2024
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2024-2511
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:openssl11, p-cpe:/a:amazon:linux:openssl11-debuginfo, p-cpe:/a:amazon:linux:openssl11-devel, p-cpe:/a:amazon:linux:openssl11-static, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:openssl11-libs
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 6/6/2024
Vulnerability Publication Date: 4/8/2024
Reference Information
CVE: CVE-2024-2511
IAVA: 2024-A-0208-S