CVE-2021-39275
httpd: Out-of-bounds write in ap_escape_quotes() via malicious input
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 16, 2021
Updated · October 9, 2026
Description
An out-of-bounds write in function ap_escape_quotes of httpd allows an unauthenticated remote attacker to crash the server or potentially execute code on the system with the privileges of the httpd user, by providing malicious input to the function.
Statement
No httpd module in Red Hat Enterprise Linux and Red Hat Software Collections pass untrusted data to ap_escape_quotes function, thus the Impact of the flaw has been set to Moderate.
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
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write