CVE-2021-44790
Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier
CRITICAL 9.8EPSS 96.8%
A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.
- Affected
- Apache Software Foundation · Apache HTTP Server
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 96.84% chance of exploitation in the next 30 days, 100th percentile
- Published
- 2021-12-20
- Updated
- 2024-08-04
Proof-of-concept exploits (2)
- nuPacaChi/-CVE-2021-447904★ · 2023-12-05
- CerberusMrXi/Apache-Lua-Buffer-Overflow-Exploit-CVE-2021-447901★ · 2026-08-07
ExploitDB entries (1)
Security advisories
- http://httpd.apache.org/security/vulnerabilities_24.html
- 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/2021/12/20/4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://security.gentoo.org/glsa/202208-20
- https://security.netapp.com/advisory/ntap-20211224-0001
- https://support.apple.com/kb/HT213255
- https://support.apple.com/kb/HT213256
- https://support.apple.com/kb/HT213257
- https://www.debian.org/security/2022/dsa-5035
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.tenable.com/security/tns-2022-01
- https://www.tenable.com/security/tns-2022-03