What’s Vulnerable › Vulnerabilities

CVE-2022-23943: mod_sed: Read/write beyond bounds

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 50.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-14 · updated 2026-06-17
• Weakness: CWE-190

Description

Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions.

Affected products

• Apache HTTP Server: from 2.4.0 before 2.4.53 — fixed in 2.4.53
• Debian Linux: 9.0
• Fedoraproject Fedora: 34, 35, 36
• Oracle Corporation Oracle HTTP Server: 12.2.1.3.0, 12.2.1.4.0
• Oracle Corporation Oracle ZFS Storage Appliance Kit: 8.8

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.53. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2022/03/14/1
• https://httpd.apache.org/security/vulnerabilities_24.html
• https://lists.debian.org/debian-lts-announce/2022/03/msg00033.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/
• https://security.gentoo.org/glsa/202208-20
• https://security.netapp.com/advisory/ntap-20220321-0001/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://www.tenable.com/security/tns-2022-08
• https://www.tenable.com/security/tns-2022-09
• http://www.openwall.com/lists/oss-security/2022/03/14/1

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