Buffer overflow in Apache HTTP Server
CVE-2021-44790
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.
Vulnerability class: Buffer Overflow
EPSS: 0.968 (99.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Http_server
- Apache Software Foundation Http Server — versions Apache HTTP Server 2.4
- Apple Macos
- Apple Mac_os_x — versions 10.15.7
- Netapp Cloud_backup
- Oracle Communications_element_manager
- Oracle Communications_operations_monitor — versions 4.3, 4.4, 5.0
- Oracle Communications_session_report_manager
- Oracle Communications_session_route_manager
- Oracle Http_server — versions 12.2.1.3.0, 12.2.1.4.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Vendor Advisory)
- security@apache.org (mailing-list, Mailing List, Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory)
- security@apache.org (Patch, Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44790?
- CVE-2021-44790 is a critical-severity vulnerability in Apache HTTP Server, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-12-20.
- How severe is CVE-2021-44790?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-44790 known to be exploited?
- 25 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.