Home > Vulnerability Database > CVE-2021-36740

Mend.io Vulnerability Database

CVE-2021-36740

Date: July 14, 2021

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.

Language: C

Severity Score

6.5

Related Resources (15)

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/

Url: https://security.alpinelinux.org/vuln/CVE-2021-36740

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-36740

Url: https://docs.varnish-software.com/security/VSV00007/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/

Url: https://varnish-cache.org/security/VSV00007.html

Url: https://github.com/varnishcache/varnish-cache/commit/82b0a629f60136e76112c6f2c6372cce77b683be

Url: https://github.com/varnishcache/varnish-cache/commit/9be22198e258d0e7a5c41f4291792214a29405cf

Url: https://security-tracker.debian.org/tracker/CVE-2021-36740

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-36740

Url: https://access.redhat.com/security/cve/CVE-2021-36740

Url: https://www.debian.org/security/2022/dsa-5088

Url: https://www.mend.io/vulnerability-database/CVE-2021-36740

Severity Score

6.5

Weakness Type (CWE)

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CWE-444

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	LOW
Integrity (I):	LOW
Availability (A):	NONE

CVSS v2

Base Score:	6.4
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	NONE
Additional information:

Mend.io Vulnerability Database

We found results for “”

CVE-2021-36740

Date: July 14, 2021

Language: C

Severity Score

Related Resources (15)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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