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Linux Distros Unpatched Vulnerability : CVE-2023-27534

high Nessus Plugin ID 226718

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be wrongly replaced when used as a prefix in the first path element, in addition to its intended use as the first element to indicate a path relative to the user's home directory. Attackers can exploit this flaw to bypass filtering or execute arbitrary code by crafting a path like /~2/foo while accessing a server with a specific user. (CVE-2023-27534)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2023-27534

Plugin Details

Severity: High

ID: 226718

File Name: unpatched_CVE_2023_27534.nasl

Version: 1.4

Type: local

Agent: unix

Family: Misc.

Published: 3/5/2025

Updated: 9/5/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2023-27534

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

CVSS Score Source: CVE-2023-27534

Vulnerability Information

CPE: p-cpe:/a:centos:centos:libcurl-devel, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:libcurl, p-cpe:/a:centos:centos:curl, p-cpe:/a:centos:centos:libcurl-minimal, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:curl, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:libcurl-minimal, p-cpe:/a:redhat:enterprise_linux:libcurl-devel, p-cpe:/a:redhat:enterprise_linux:libcurl, cpe:/o:redhat:enterprise_linux:8

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 3/20/2023

Reference Information

CVE: CVE-2023-27534