CVE-2021-39275

CRITICAL

Apache HTTP Server < 2.4.49 - Out-of-bounds Write in ap_escape_quotes()

Title source: llm
STIX 2.1

Description

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

References (15)

Core 15
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://httpd.apache.org/security/vulnerabilities_24.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4982
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpujan2022.html
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20211008-0004/
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuapr2022.html
Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202208-20

Scores

CVSS v3 9.8
EPSS 0.3767
EPSS Percentile 97.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (17)
apache/http_server < 2.4.49
debian/debian_linux 9.0
debian/debian_linux 10.0
debian/debian_linux 11.0
fedoraproject/fedora 34
fedoraproject/fedora 35
netapp/cloud_backup
netapp/clustered_data_ontap
netapp/storagegrid
oracle/http_server 12.2.1.3.0
... and 7 more
Published Sep 16, 2021
Tracked Since Feb 18, 2026