CVE-2021-31618

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Source
https://cve.org/CVERecord?id=CVE-2021-31618
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-31618.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-31618
Aliases
Downstream
Related
Published
2021-06-15T09:15:07.960Z
Modified
2026-04-16T00:08:18.239093815Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "1.15.17"
                }
            ],
            "cpe": "cpe:2.3:a:apache:http_server:1.15.17:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "12.4.0.0"
                }
            ],
            "cpe": "cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "17.1"
                }
            ],
            "cpe": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "17.2"
                }
            ],
            "cpe": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "17.3"
                }
            ],
            "cpe": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "8.8"
                }
            ],
            "cpe": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "10.0"
                }
            ],
            "cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "9.0"
                }
            ],
            "cpe": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "33"
                }
            ],
            "cpe": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "34"
                }
            ],
            "cpe": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
        }
    ]
}
References

Affected packages

Git / github.com/apache/httpd

Affected ranges

Type
GIT
Repo
https://github.com/apache/httpd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
f442d2ad7489aa917a6113d016805dbd110b706c
Database specific 
{
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.4.47"
        }
    ],
    "cpe": "cpe:2.3:a:apache:http_server:2.4.47:*:*:*:*:*:*:*"
}

Affected versions

2.*
2.4.47

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-31618.json"