CentOS 9 : curl-7.76.1-28.el9

critical Nessus Plugin ID 191362

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Synopsis

The remote CentOS host is missing a security update for curl.

Description

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the curl-7.76.1-28.el9 build changelog.

- This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due to this bug, the local variable that means let the host resolve the name could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target buffer instead of copying just the resolved address there. The target buffer being a heap based buffer, and the host name coming from the URL that curl has been told to operate with. (CVE-2023-38545)

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

Solution

Update the CentOS 9 Stream curl package.

Plugin Details

Severity: Critical

ID: 191362

File Name: centos9_curl-7_76_1-28.nasl

Version: 1.4

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 2/29/2024

Updated: 4/29/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2023-38545

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:curl, cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:libcurl, p-cpe:/a:centos:centos:libcurl-minimal, p-cpe:/a:centos:centos:libcurl-devel, p-cpe:/a:centos:centos:curl-minimal

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/10/2023

Vulnerability Publication Date: 10/10/2023

Reference Information

CVE: CVE-2023-38545

IAVA: 2023-A-0531-S

Detections

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