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gentooGentoo FoundationGLSA-202105-38
HistoryMay 26, 2021 - 12:00 a.m.

nginx: Remote code execution

2021-05-2600:00:00
Gentoo Foundation
security.gentoo.org
255

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.582 Medium

EPSS

Percentile

97.7%

JSON

Background

nginx is a robust, small, and high performance HTTP and reverse proxy server.

Description

It was discovered that nginx did not properly handle DNS responses when “resolver” directive is used.

Impact

A remote attacker, able to provide DNS responses to a nginx instance, could cause the execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All nginx users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-servers/nginx-1.20.1"

All nginx mainline users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose
 ">=www-servers/nginx-1.21.0:mainline"
OSVersionArchitecturePackageVersionFilename
Gentooanyallwww-servers/nginx< 1.21.0UNKNOWN

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7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

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

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.582 Medium

EPSS

Percentile

97.7%

JSON
Related for GLSA-202105-38
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