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ubuntucveUbuntu.comUB:CVE-2021-36740
HistoryJul 14, 2021 - 12:00 a.m.

CVE-2021-36740

2021-07-1400:00:00
ubuntu.com
ubuntu.com
22
varnish cache
http/2
request smuggling
vcl authorization bypass
content-length header
post request
varnish enterprise
varnish cache
security vulnerability

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

0.007

Percentile

79.9%

JSON

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.

Bugs

Notes

Author Note
ebarretto According to Debian: (HTTP/2 support is marked experimental in 5.0 and enabling is not recommended, code is quite different)
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchvarnish< 6.2.1-2ubuntu0.1UNKNOWN
ubuntu21.10noarchvarnish< 6.5.2-1UNKNOWN

Related

nessus 9
almalinux 1
mageia 1
redhat 2
fedora 4
openvas 7
redhatcve 1
osv 5
rocky 1
archlinux 1
prion 1
oraclelinux 1
nvd 1
alpinelinux 1
debiancve 1
cvelist 1
veracode 1
cve 1
debian 1
suse 1
ubuntu 1
nessus
nessus
RHEL 7 : rh-varnish6-varnish (RHSA-2021:2993)
2021-08-09 00:00:00
Oracle Linux 8 : varnish:6 (ELSA-2021-2988)
2021-08-03 00:00:00
Rocky Linux 8 : varnish:6 (RLSA-2021:2988)
2023-11-06 00:00:00
almalinux
almalinux
Important: varnish:6 security update
2021-08-02 14:30:38
mageia
mageia
Updated varnish packages fix a security vulnerability
2021-07-28 23:00:51
redhat
redhat
(RHSA-2021:2988) Important: varnish:6 security update
2021-08-02 14:30:38
(RHSA-2021:2993) Important: rh-varnish6-varnish security update
2021-08-03 08:11:12
fedora
fedora
[SECURITY] Fedora 34 Update: varnish-6.5.2-1.fc34
2021-07-25 01:03:42
[SECURITY] Fedora 34 Update: vmod-uuid-1.8-4.fc34
2021-07-25 01:03:43
[SECURITY] Fedora 33 Update: varnish-6.4.0-5.fc33
2021-07-25 01:05:53
openvas
openvas
Fedora: Security Advisory for vmod-uuid (FEDORA-2021-cf7585f0ca)
2021-07-27 00:00:00
Fedora: Security Advisory for varnish (FEDORA-2021-cf7585f0ca)
2021-07-27 00:00:00
Fedora: Security Advisory for varnish (FEDORA-2021-36e10d3f9f)
2021-07-27 00:00:00
redhatcve
redhatcve
CVE-2021-36740
2021-07-14 19:25:13
osv
osv
CVE-2021-36740
2021-07-14 17:15:08
Important: varnish:6 security update
2021-08-02 14:30:38
BIT-varnish-2021-36740
2024-03-06 11:08:33
rocky
rocky
varnish:6 security update
2021-08-02 14:30:38
archlinux
archlinux
[ASA-202107-28] varnish: url request injection
2021-07-14 00:00:00
prion
prion
Authorization
2021-07-14 17:15:00
oraclelinux
oraclelinux
varnish:6 security update
2021-08-03 00:00:00
nvd
nvd
CVE-2021-36740
2021-07-14 17:15:08
alpinelinux
alpinelinux
CVE-2021-36740
2021-07-14 17:15:08
debiancve
debiancve
CVE-2021-36740
2021-07-14 17:15:08
cvelist
cvelist
CVE-2021-36740
2021-07-14 16:07:28
veracode
veracode
Authorization Bypass
2021-07-19 00:55:44
cve
cve
CVE-2021-36740
2021-07-14 17:15:08
debian
debian
[SECURITY] [DSA 5088-1] varnish security update
2022-03-03 19:50:31
suse
suse
Security update for varnish (important)
2022-05-27 00:00:00
ubuntu
ubuntu
Varnish Cache vulnerabilities
2022-06-08 00:00:00

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS

0.007

Percentile

79.9%

JSON
Related for UB:CVE-2021-36740
nessus9almalinux1mageia1redhat2fedora4openvas7redhatcve1osv5rocky1archlinux1prion1oraclelinux1nvd1alpinelinux1debiancve1cvelist1veracode1cve1debian1suse1ubuntu1