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Debian Linux CVE-2020-9490

HIGH
HTTP Request/Response Smuggling (CWE-444)
2020-08-07 security@apache.org
Denial Of Service Apache Debian Oracle Red Hat Canonical Request Smuggling Debian Linux Enterprise Linux Enterprise Linux Eus Enterprise Linux For Ibm Z Systems Enterprise Linux For Ibm Z Systems Eus Enterprise Linux For Power Little Endian Enterprise Linux For Power Little Endian Eus Enterprise Linux Server Aus Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Enterprise Linux Server Tus Enterprise Linux Server Update Services For Sap Solutions Fedora Http Server Leap Ubuntu Linux Openstack Enterprise Manager Ops Center Zfs Storage Appliance Kit Opensuse Software Collections Instantis Enterprisetrack Communications Element Manager Communications Session Report Manager Communications Session Route Manager Hyperion Infrastructure Technology Openstack For Ibm Power Fedoraproject
7.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

1
CVE Published
Aug 07, 2020 - 16:15 nvd
HIGH 7.5

DescriptionNVD

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.

AnalysisAI

Apache HTTP Server versions 2.4.20 to 2.4.43. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This HTTP Request/Response Smuggling vulnerability could allow attackers to manipulate HTTP request interpretation between frontend and backend servers.

Technical ContextAI

This vulnerability is classified as HTTP Request/Response Smuggling (CWE-444), which allows attackers to manipulate HTTP request interpretation between frontend and backend servers. 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. Affected products include: Apache Http Server, Oracle Communications Element Manager, Oracle Communications Session Report Manager, Oracle Communications Session Route Manager, Oracle Enterprise Manager Ops Center.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Enforce strict HTTP parsing, normalize requests at proxy layer, use HTTP/2 end-to-end, reject ambiguous headers.

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CVE-2020-9490 vulnerability details – vuln.today
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