Upstream information

CVE-2021-36740 at MITRE

Description

Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
CVSS detail National Vulnerability Database
Base Score 6.4
Vector AV:N/AC:L/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
CVSS detail National Vulnerability Database SUSE
Base Score 6.5 8.1
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network Network
Attack Complexity Low High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact Low High
Integrity Impact Low High
Availability Impact None High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1188470 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP3
  • libvarnishapi3 >= 7.1.0-bp153.2.3.1
  • varnish >= 7.1.0-bp153.2.3.1
  • varnish-devel >= 7.1.0-bp153.2.3.1
 Patchnames:
openSUSE-2022-148
openSUSE Leap 15.3
  • libvarnishapi3 >= 7.1.0-bp153.2.3.1
  • varnish >= 7.1.0-bp153.2.3.1
  • varnish-devel >= 7.1.0-bp153.2.3.1
 Patchnames:
openSUSE-2022-148

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP3 varnish Released

SUSE Timeline for this CVE

CVE page created: Thu Jul 15 14:54:51 2021
CVE page last modified: Thu Dec 11 16:57:29 2025