Detections
Analytics
OpenSSL 3.1.0 < 3.1.6 Vulnerability
medium Nessus Plugin ID 192974
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Synopsis
The remote service is affected by a vulnerability.Description
The version of OpenSSL installed on the remote host is prior to 3.1.6. It is, therefore, affected by a vulnerability as referenced in the 3.1.6 advisory.- Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded 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 is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force 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 TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue. Found by Manish Patidar (Hewlett Packard Enterprise). Fix developed by Matt Caswell. Fixed in OpenSSL 3.0.14 (Affected since 3.0.0). (CVE-2024-2511)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to OpenSSL version 3.1.6 or later.See Also
Plugin Details
Severity: Medium
ID: 192974
File Name: openssl_3_1_6.nasl
Version: 1.1
Type: combined
Agent: windows, macosx, unix
Family: Web Servers
Published: 4/8/2024
Updated: 4/12/2024
Configuration: Enable thorough checks
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
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: cpe:/a:openssl:openssl
Required KB Items: installed_sw/OpenSSL
Exploit Ease: No known exploits are available
Patch Publication Date: 4/8/2024
Vulnerability Publication Date: 4/8/2024
Reference Information
CVE: CVE-2024-2511
IAVA: 2024-A-0208