CVE-2021-44790

Public Exploit
Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier

Description

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 86.02% Top 5%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory apache.org
Affected: Apache Software Foundation Apache HTTP Server
Published at:
Updated at:

References

Link Tags
http://httpd.apache.org/security/vulnerabilities_24.html vendor advisory
http://www.openwall.com/lists/oss-security/2021/12/20/4 third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/ third party advisory vendor advisory
https://www.debian.org/security/2022/dsa-5035 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch
https://security.netapp.com/advisory/ntap-20211224-0001/ third party advisory
https://www.tenable.com/security/tns-2022-01 third party advisory
https://www.tenable.com/security/tns-2022-03 third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/ third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/ third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpuapr2022.html third party advisory patch
https://support.apple.com/kb/HT213257 third party advisory
https://support.apple.com/kb/HT213256 third party advisory
https://support.apple.com/kb/HT213255 third party advisory
http://seclists.org/fulldisclosure/2022/May/33 third party advisory mailing list
http://seclists.org/fulldisclosure/2022/May/35 third party advisory mailing list
http://seclists.org/fulldisclosure/2022/May/38 third party advisory mailing list
https://security.gentoo.org/glsa/202208-20 third party advisory vendor advisory
http://packetstormsecurity.com/files/171631/Apache-2.4.x-Buffer-Overflow.html exploit

Frequently Asked Questions

What is the severity of CVE-2021-44790?
CVE-2021-44790 has been scored as a critical severity vulnerability.
How to fix CVE-2021-44790?
To fix CVE-2021-44790, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-44790 being actively exploited in the wild?
It is possible that CVE-2021-44790 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~86% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-44790?
CVE-2021-44790 affects Apache Software Foundation Apache HTTP Server.
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