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gentooGentoo FoundationGLSA-202101-38
HistoryJan 29, 2021 - 12:00 a.m.

NSD: Symbolic link traversal

2021-01-2900:00:00
Gentoo Foundation
security.gentoo.org
59
nsd
symlink attack
vulnerability
upgrade
net-dns/nsd-4.3.4

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0

Percentile

14.2%

JSON

Background

An authoritative only, high performance, open source name server

Description

A local vulnerability was discovered that would allow for a local symlink attack due to how NSD handles PID files.

Impact

A local attacker could cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All NSD users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-dns/nsd-4.3.4"
OSVersionArchitecturePackageVersionFilename
Gentooanyallnet-dns/nsd< 4.3.4UNKNOWN

Related

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redhatcve 1
openvas 20
debiancve 1
ubuntucve 1
mageia 1
cvelist 1
archlinux 2
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veracode 1
cbl_mariner 2
cve 1
nvd 1
freebsd 1
prion 1
alpinelinux 1
suse 2
debian 2
rosalinux 1
photon 6
rocky 1
redhat 6
amazon 2
almalinux 1
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ubuntu 1
cloudfoundry 1
nessus
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2020-12-07 00:00:00
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amazon
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Medium: unbound
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2021-07-01 01:09:00
almalinux
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2021-05-18 06:15:09
oraclelinux
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2021-05-25 00:00:00
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2021-05-06 00:00:00
cloudfoundry
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CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0

Percentile

14.2%

JSON
Related for GLSA-202101-38
nessus34redhatcve1openvas20debiancve1ubuntucve1mageia1cvelist1archlinux2osv5veracode1cbl_mariner2cve1nvd1freebsd1prion1alpinelinux1suse2debian2rosalinux1photon6rocky1redhat6amazon2almalinux1oraclelinux1ubuntu1cloudfoundry1