VulnerabilityModified

CVE-2021-44224

HIGH 8.2EPSS 82.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 82.3%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).

CVSS 3.1: 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS: 82.30% probability · 100th percentile
CISA KEV: Not listed
Weakness: CWE-476
Affected: apache/http server · fedoraproject/fedora · debian/debian linux · tenable/tenable.sc · oracle/communications element manager · oracle/communications operations monitor · oracle/communications session report manager · oracle/communications session route manager · oracle/http server · oracle/instantis enterprisetrack · apple/mac os x · apple/macos
Source: security@apache.org

References

http://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
http://seclists.org/fulldisclosure/2022/May/33Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2022/May/35Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2022/May/38Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/12/20/3Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/
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/202208-20Third Party Advisory
https://security.netapp.com/advisory/ntap-20211224-0001/Third Party Advisory
https://support.apple.com/kb/HT213255Third Party Advisory
https://support.apple.com/kb/HT213256Third Party Advisory
https://support.apple.com/kb/HT213257Third Party Advisory
https://www.debian.org/security/2022/dsa-5035Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
https://www.tenable.com/security/tns-2022-01Third Party Advisory
https://www.tenable.com/security/tns-2022-03Third Party Advisory
http://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
http://seclists.org/fulldisclosure/2022/May/33Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2022/May/35Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2022/May/38Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/12/20/3Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/
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/202208-20Third Party Advisory
https://security.netapp.com/advisory/ntap-20211224-0001/Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.