CVE-2021-31618

CWE-476 — NULL Pointer Dereference8 documents8 sources
Severity
7.5HIGH
EPSS
11.0%
top 6.57%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Apache Software Foundation Apache Http ServerApache Http ServerDebian Debian Linux+4 more
Timeline
PublishedJun 15
Latest updateMay 24

Description

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 …

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶NVDapache/http_server1.15.17, 2.4.47+1
▶Debianapache2< 2.4.46-5+3
▶NVDoracle/instantis_enterprisetrack17.1, 17.2, 17.3+2

Also affects: Debian Linux 10.0, 9.0, Fedora 33, 34

Patches

Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-4jq3-qrx6-87cc: Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server↗2022-05-24
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CVEList
NULL pointer dereference on specially crafted HTTP/2 request↗2021-06-15
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OSV
CVE-2021-31618: Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server↗2021-06-15
▶

📋Vendor Advisories

4
Microsoft
NULL pointer dereference on specially crafted HTTP/2 request↗2021-06-08
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Red Hat
httpd: NULL pointer dereference on specially crafted HTTP/2 request↗2021-06-04
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Debian
CVE-2021-31618: apache2 - Apache HTTP Server protocol handler for the HTTP/2 protocol checks received requ...↗2021
▶
Apache
Apache httpd: CVE-2021-31618↗
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CVE-2021-31618 (HIGH CVSS 7.5) | Apache HTTP Server protocol handler | cvebase.io