Detections
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Rocky Linux 8 : curl (RLSA-2023:4523)
medium Nessus Plugin ID 182729
Synopsis
The remote Rocky Linux host is missing one or more security updates.Description
The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2023:4523 advisory.- An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed. (CVE-2023-27536)
- An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as Subject Alternative Name in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to pattern match, but the wildcard check in curl could still check for `x*`, which would match even though the IDN name most likely contained nothing even resembling an `x`. (CVE-2023-28321)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
https://errata.rockylinux.org/RLSA-2023:4523
Plugin Details
Severity: Medium
ID: 182729
File Name: rocky_linux_RLSA-2023-4523.nasl
Version: 1.1
Type: local
Published: 10/6/2023
Updated: 11/6/2023
Supported Sensors: Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.2
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N
CVSS Score Source: CVE-2023-28321
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:rocky:linux:libcurl-devel, p-cpe:/a:rocky:linux:libcurl, cpe:/o:rocky:linux:8, p-cpe:/a:rocky:linux:libcurl-debuginfo, p-cpe:/a:rocky:linux:curl, p-cpe:/a:rocky:linux:libcurl-minimal-debuginfo, p-cpe:/a:rocky:linux:curl-debugsource, p-cpe:/a:rocky:linux:curl-debuginfo, p-cpe:/a:rocky:linux:libcurl-minimal
Required KB Items: Host/local_checks_enabled, Host/RockyLinux/release, Host/RockyLinux/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/6/2023
Vulnerability Publication Date: 3/20/2023
Reference Information
CVE: CVE-2023-27536, CVE-2023-28321
IAVA: 2023-A-0153-S, 2023-A-0259-S