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SUSE SLES15 Security Update : curl (SUSE-SU-2023:2227-1)
medium Nessus Plugin ID 176046
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Synopsis
The remote SUSE host is missing one or more security updates.Description
The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:2227-1 advisory.- A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave. (CVE-2023-28320)
- 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)
- An information disclosure vulnerability exists in curl <v8.1.0 when doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the `CURLOPT_POSTFIELDS` option has been set, if the same handle previously wasused to issue a `PUT` request which used that callback. This flaw may surprise the application and cause it to misbehave and either send off the wrong data or use memory after free or similar in the second transfer. The problem exists in the logic for a reused handle when it is (expected to be) changed from a PUT to a POST. (CVE-2023-28322)
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 curl, libcurl-devel, libcurl4 and / or libcurl4-32bit packages.See Also
https://bugzilla.suse.com/1211231
https://bugzilla.suse.com/1211232
https://bugzilla.suse.com/1211233
https://bugzilla.suse.com/1211339
https://lists.suse.com/pipermail/sle-updates/2023-May/029438.html
https://www.suse.com/security/cve/CVE-2023-28320
Plugin Details
Severity: Medium
ID: 176046
File Name: suse_SU-2023-2227-1.nasl
Version: 1.7
Type: local
Agent: unix
Family: SuSE Local Security Checks
Published: 5/18/2023
Updated: 7/20/2023
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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:novell:suse_linux:curl, p-cpe:/a:novell:suse_linux:libcurl4, p-cpe:/a:novell:suse_linux:libcurl4-32bit, p-cpe:/a:novell:suse_linux:libcurl-devel, cpe:/o:novell:suse_linux:15
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/17/2023
Vulnerability Publication Date: 5/18/2023
Reference Information
CVE: CVE-2023-28320, CVE-2023-28321, CVE-2023-28322
IAVA: 2023-A-0259-S
SuSE: SUSE-SU-2023:2227-1