CVE-2020-9490

httpd: Push diary crash on specifically crafted HTTP/2 header

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.

Apache HTTP Server versiones 2.4.20 hasta 2.4.43.. Un valor especialmente diseñado para el encabezado "Cache-Digest" en una petición HTTP/2 resultaría en un bloqueo cuando el servidor realmente intenta un PUSH HTTP/2 un recurso mas tarde. Una configuración de la funcionalidad HTTP/2 por medio de "H2Push off" mitigará esta vulnerabilidad para los servidores no parcheados

A flaw was found in Apache httpd in versions prior to 2.4.46. A specially crafted Cache-Digest header triggers negative argument to memmove() that could lead to a crash and denial of service. The highest threat from this vulnerability is to system availability.

Apache 2 suffers from a memory corruption vulnerability in the mod_http2 push diary implementation.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-03-01 CVE Reserved
2020-08-07 CVE Published
2024-07-14 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CAPEC

References (31)

URL	Tag	Source
http://packetstormsecurity.com/files/160392/Apache-2.4.43-mod_http2-Memory-Corruption.html	Third Party Advisory
https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d9ff991471e8775%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r0b6541c5fb2f8fb383861333400add7def625bc993300300de0b4f8d%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r5debe8f82728a00a4a68bc904dd6c35423bdfc8d601cfb4579f38bf1%40%3Cdev.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r623de9b2b2433a87f3f3a15900419fc9c00c77b26936dfea4060f672%40%3Cdev.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r97d0faab6ed8fd0d439234b16d05d77b22a07b0c4817e7b3cca419cc%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9e485ce5a01c9dc3d4d785a7d28aa7400ead1e81884034ff1f03cfee%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9e9f1a7609760f0f80562eaaec2aa3c32d525c3e0fca98b475240c71%40%3Cdev.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/ra4da876037477c06f2677d7a1e10b5a8613000fca99c813958070fe9%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rdf3e5d0a5f5c3d90d6013bccc6c4d5af59cf1f8c8dea5d9a283d13ce%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rfed9fea918e090383da33e393eb6c2755fccf05032bd7d6eb4737c9e%40%3Ccvs.httpd.apache.org%3E	Mailing List
https://security.netapp.com/advisory/ntap-20200814-0005	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://www.oracle.com/security-alerts/cpujan2021.html	2023-11-07
https://www.oracle.com/security-alerts/cpuoct2020.html	2023-11-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html	2023-11-07
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-9490	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4NKWG2EXAQQB6LMLATKZ7KLSRGCSHVAN	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITVFDBVM6E3JF3O7RYLRPRCH3RDRHJJY	2023-11-07
https://security.gentoo.org/glsa/202008-04	2023-11-07
https://usn.ubuntu.com/4458-1	2023-11-07
https://www.debian.org/security/2020/dsa-4757	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-9490	2020-09-14
https://bugzilla.redhat.com/show_bug.cgi?id=1866560	2020-09-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Redhat Search vendor "Redhat"	Software Collections Search vendor "Redhat" for product "Software Collections"	1.0 Search vendor "Redhat" for product "Software Collections" and version "1.0"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0"	-	Safe
Redhat Search vendor "Redhat"	Software Collections Search vendor "Redhat" for product "Software Collections"	1.0 Search vendor "Redhat" for product "Software Collections" and version "1.0"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"	-	Safe
Redhat Search vendor "Redhat"	Software Collections Search vendor "Redhat" for product "Software Collections"	1.0 Search vendor "Redhat" for product "Software Collections" and version "1.0"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	7.6 Search vendor "Redhat" for product "Enterprise Linux" and version "7.6"	-	Safe
Redhat Search vendor "Redhat"	Software Collections Search vendor "Redhat" for product "Software Collections"	1.0 Search vendor "Redhat" for product "Software Collections" and version "1.0"	-	Affected	in	Redhat Search vendor "Redhat"	Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"	7.7 Search vendor "Redhat" for product "Enterprise Linux" and version "7.7"	-	Safe
Apache Search vendor "Apache"		Http Server Search vendor "Apache" for product "Http Server"				>= 2.4.20 < 2.4.46 Search vendor "Apache" for product "Http Server" and version " >= 2.4.20 < 2.4.46"		-		Affected
Oracle Search vendor "Oracle"		Communications Element Manager Search vendor "Oracle" for product "Communications Element Manager"				>= 8.2.0 <= 8.2.2 Search vendor "Oracle" for product "Communications Element Manager" and version " >= 8.2.0 <= 8.2.2"		-		Affected
Oracle Search vendor "Oracle"		Communications Session Report Manager Search vendor "Oracle" for product "Communications Session Report Manager"				>= 8.2.0 <= 8.2.2 Search vendor "Oracle" for product "Communications Session Report Manager" and version " >= 8.2.0 <= 8.2.2"		-		Affected
Oracle Search vendor "Oracle"		Communications Session Route Manager Search vendor "Oracle" for product "Communications Session Route Manager"				>= 8.2.0 <= 8.2.2 Search vendor "Oracle" for product "Communications Session Route Manager" and version " >= 8.2.0 <= 8.2.2"		-		Affected
Oracle Search vendor "Oracle"		Enterprise Manager Ops Center Search vendor "Oracle" for product "Enterprise Manager Ops Center"				12.4.0.0 Search vendor "Oracle" for product "Enterprise Manager Ops Center" and version "12.4.0.0"		-		Affected
Oracle Search vendor "Oracle"		Hyperion Infrastructure Technology Search vendor "Oracle" for product "Hyperion Infrastructure Technology"				11.1.2.4 Search vendor "Oracle" for product "Hyperion Infrastructure Technology" and version "11.1.2.4"		-		Affected
Oracle Search vendor "Oracle"		Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack"				17.1 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.1"		-		Affected
Oracle Search vendor "Oracle"		Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack"				17.2 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.2"		-		Affected
Oracle Search vendor "Oracle"		Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack"				17.3 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.3"		-		Affected
Oracle Search vendor "Oracle"		Zfs Storage Appliance Kit Search vendor "Oracle" for product "Zfs Storage Appliance Kit"				8.8 Search vendor "Oracle" for product "Zfs Storage Appliance Kit" and version "8.8"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.1 Search vendor "Opensuse" for product "Leap" and version "15.1"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				15.2 Search vendor "Opensuse" for product "Leap" and version "15.2"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				20.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "20.04"		lts		Affected
Redhat Search vendor "Redhat"		Openstack Search vendor "Redhat" for product "Openstack"				16.1 Search vendor "Redhat" for product "Openstack" and version "16.1"		-		Affected
Redhat Search vendor "Redhat"		Openstack For Ibm Power Search vendor "Redhat" for product "Openstack For Ibm Power"				16.1 Search vendor "Redhat" for product "Openstack For Ibm Power" and version "16.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.1 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus"				8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Ibm Z Systems Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems"				8.0 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus"				8.1 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus"				8.2 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus"				8.6 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Power Little Endian Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian"				8.0 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus"				8.1 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus"				8.2 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus"				8.4 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus"				8.6 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus"				8.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions"				8.1 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions"				8.6 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus"				8.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.6"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions"				8.1 Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions" and version "8.1"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions"				8.2 Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions" and version "8.2"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions"				8.4 Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions" and version "8.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions"				8.6 Search vendor "Redhat" for product "Enterprise Linux Server Update Services For Sap Solutions" and version "8.6"		-		Affected