VulnerableCode Package Details - pkg:apache/httpd@2.4.47

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Vulnerability	Summary	Fixed by
VCID-fccq-2kpj-aaap Aliases: CVE-2021-36160	A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).	2.4.49 Affected by 4 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}
VCID-t7fa-jbkc-aaab Aliases: CVE-2021-44224	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).	2.4.52 Affected by 4 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}
VCID-vxz1-6nus-aaaf Aliases: 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 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.	2.4.48 Affected by 6 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}
VCID-z9au-scjh-aaae Aliases: CVE-2021-33193	A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.	2.4.49 Affected by 4 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}

Vulnerability

Summary

Fixed by

VCID-fccq-2kpj-aaap
Aliases:
CVE-2021-36160

A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).

2.4.49
Affected by 4 other vulnerabilities.

VCID-t7fa-jbkc-aaab
Aliases:
CVE-2021-44224

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).

2.4.52
Affected by 4 other vulnerabilities.

VCID-vxz1-6nus-aaaf
Aliases:
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 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.

2.4.48
Affected by 6 other vulnerabilities.

VCID-z9au-scjh-aaae
Aliases:
CVE-2021-33193

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

2.4.49
Affected by 4 other vulnerabilities.

Vulnerability	Summary	Aliases
VCID-2dyn-1fxu-aaaa	Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service	CVE-2020-13950
VCID-38cq-p1jy-aaag	Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'	CVE-2021-30641
VCID-6cg8-antz-aaap	Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service	CVE-2021-26690
VCID-avfr-zuw1-aaam	Apache HTTP Server versions 2.4.0 to 2.4.46 Unprivileged local users can stop httpd on Windows	CVE-2020-13938
VCID-cspd-eg4d-aaaf	In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow	CVE-2021-26691
VCID-nfk5-fhfj-aaaf	Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.	CVE-2019-17567
VCID-qz6b-x9ps-aaae	Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow	CVE-2020-35452

Vulnerability

Summary

Aliases

VCID-2dyn-1fxu-aaaa

Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service

CVE-2020-13950

VCID-38cq-p1jy-aaag

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

CVE-2021-30641

VCID-6cg8-antz-aaap

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

CVE-2021-26690

VCID-avfr-zuw1-aaam

Apache HTTP Server versions 2.4.0 to 2.4.46 Unprivileged local users can stop httpd on Windows

CVE-2020-13938

VCID-cspd-eg4d-aaaf

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

CVE-2021-26691

VCID-nfk5-fhfj-aaaf

Apache HTTP Server versions 2.4.6 to 2.4.46 mod_proxy_wstunnel configured on an URL that is not necessarily Upgraded by the origin server was tunneling the whole connection regardless, thus allowing for subsequent requests on the same connection to pass through with no HTTP validation, authentication or authorization possibly configured.

CVE-2019-17567

VCID-qz6b-x9ps-aaae

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow

CVE-2020-35452

Date	Actor	Action	Vulnerability	Source	VulnerableCode Version
2025-03-28T12:34:57.336660+00:00	Apache HTTPD Importer	Affected by	VCID-vxz1-6nus-aaaf	https://httpd.apache.org/security/json/CVE-2021-31618.json	36.0.0
2024-11-18T22:53:07.612555+00:00	Apache HTTPD Importer	Affected by	VCID-vxz1-6nus-aaaf	https://httpd.apache.org/security/json/CVE-2021-31618.json	34.3.2
2024-01-04T01:33:43.918819+00:00	Apache HTTPD Importer	Affected by	VCID-vxz1-6nus-aaaf	https://httpd.apache.org/security/json/CVE-2021-31618.json	34.0.0rc1