What’s Vulnerable › Vulnerabilities

CVE-2022-22721: core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 41.7% 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

If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier.

Affected products

• Apache HTTP Server: through 2.4.52
• macOS: from 10.15 before 10.15.7; 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004, 10.15.7-security_update_2021-005 (+6) — fixed in 10.15.7
• Apple macOS: from 11.0 before 11.6.6; from 12.0 before 12.4 — fixed in 11.6.6, 12.4
• Debian Linux: 9.0
• Fedoraproject Fedora: 34, 35, 36
• Oracle Corporation Enterprise Manager Ops Center: 12.4.0.0
• 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: macOS 10.15.7; Apple macOS 11.6.6, 12.4. Check the vendor advisory for mitigations.

References

• http://seclists.org/fulldisclosure/2022/May/33
• http://seclists.org/fulldisclosure/2022/May/35
• http://seclists.org/fulldisclosure/2022/May/38
• http://www.openwall.com/lists/oss-security/2022/03/14/2
• 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://support.apple.com/kb/HT213255

Get alerted when CVE-2022-22721 or the next vulnerability affects your stack