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CVE-2022-48624

less: missing quoting of shell metacharacters in LESSCLOSE handling

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · February 19, 2024

Updated · November 21, 2025

Description

A flaw was found in less. The close_altfile() function in filename.c omits shell_quote calls for LESSCLOSE, a command line to invoke the optional input postprocessor. This issue could lead to an OS command injection vulnerability and arbitrary command execution on the host operating system.

Statement

To exploit this issue, an attacker needs the ability to influence the LESSCLOSE environment variable. This requirement makes this CVE a Moderate impact CVE.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')