certfr_avis - CERTFR-2021-AVI-423

CERTFR-2021-AVI-423

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité a été découverte dans Apache. Elle permet à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Apache	N/A	Apache versions antérieures à 2.4.48

References

Title

Publication Time

CVE-2021-31618 (GCVE-0-2021-31618)

Vulnerability from cvelistv5 – Published: 2021-06-15 00:00 – Updated: 2024-08-03 23:03

Summary

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.

Severity ?

No CVSS data available.

CWE

CWE-476 - NULL Pointer Dereference

Assigner

apache

References

URL

Tags

	http://httpd.apache.org/security/vulnerabilities_…
	http://www.openwall.com/lists/oss-security/2021/06/10/9	mailing-list
	https://seclists.org/oss-sec/2021/q2/206
	https://lists.apache.org/thread.html/r14b66ef0f4f…	mailing-list
	https://lists.apache.org/thread.html/r783b6558abf…	mailing-list
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
	https://lists.debian.org/debian-lts-announce/2021…	mailing-list
	https://www.debian.org/security/2021/dsa-4937	vendor-advisory
	https://security.gentoo.org/glsa/202107-38	vendor-advisory
	https://www.oracle.com/security-alerts/cpuoct2021.html
	https://security.netapp.com/advisory/ntap-2021072…
	http://www.openwall.com/lists/oss-security/2024/03/13/2	mailing-list

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache HTTP Server	Affected: 2.4.47

Credits

Apache HTTP server would like to thank LI ZHI XIN from NSFocus for reporting this.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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