Slackware Linux 15.0 / current curl Multiple Vulnerabilities (SSA:2024-087-01)

high Nessus Plugin ID 192632


The remote Slackware Linux host is missing a security update to curl.


The version of curl installed on the remote host is prior to 8.7.1. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2024-087-01 advisory.

- When a protocol selection parameter option disables all protocols without adding any then the default set of protocols would remain in the allowed set due to an error in the logic for removing protocols. The below command would perform a request to with a plaintext protocol which has been explicitly disabled. curl --proto -all,-http The flaw is only present if the set of selected protocols disables the entire set of available protocols, in itself a command with no practical use and therefore unlikely to be encountered in real situations. The curl security team has thus assessed this to be low severity bug. (CVE-2024-2004)

- libcurl skips the certificate verification for a QUIC connection under certain conditions, when built to use wolfSSL. If told to use an unknown/bad cipher or curve, the error path accidentally skips the verification and returns OK, thus ignoring any certificate problems. (CVE-2024-2379)

- When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory.
Further, this error condition fails silently and is therefore not easily detected by an application.

- libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc). (CVE-2024-2466)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade the affected curl package.

See Also

Plugin Details

Severity: High

ID: 192632

File Name: Slackware_SSA_2024-087-01.nasl

Version: 1.1

Type: local

Published: 3/27/2024

Updated: 3/29/2024

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 6.0


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2024-2398


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/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:/o:slackware:slackware_linux:15.0, p-cpe:/a:slackware:slackware_linux:curl, cpe:/o:slackware:slackware_linux

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2024

Vulnerability Publication Date: 3/27/2024

Reference Information

CVE: CVE-2024-2004, CVE-2024-2379, CVE-2024-2398, CVE-2024-2466

IAVA: 2024-A-0185