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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:267378
[Rus]
Version
1
Class
patch
ALTXid
500668
Language
English
Severity
High
Title
DLA-3795-1 -- knot-resolver security update
Description
Several security vulnerabilities have been discovered in knot-resolver, a caching, DNSSEC-validating DNS resolver which may allow remote attackers to bypass DNSSEC validation or cause a denial-of-service.
Family
unix
Platform
Debian 10
Product
knot-resolver
Reference
VENDOR: DLA-3795-1
VENDOR: DLA-3795-1
Id:
DLA-3795-1
Reference:
https://lists.debian.org/debian-lts-announce/2024/debian-lts-announce-202404/msg00017.html
CVE: CVE-2019-10190
CVE: CVE-2019-10190
Id:
CVE-2019-10190
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10190
Comment
: A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
HIGH
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE:
20 (Improper Input Validation)
References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190 (CONFIRM)
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html (CONFIRM)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ (MISC)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ (MISC)
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html ()
CVE: CVE-2019-10191
CVE: CVE-2019-10191
Id:
CVE-2019-10191
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10191
Comment
: A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
HIGH
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE:
20 (Improper Input Validation)
References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191 (CONFIRM)
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html (CONFIRM)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ (MISC)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ (MISC)
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html ()
CVE: CVE-2019-19331
CVE: CVE-2019-19331
Id:
CVE-2019-19331
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19331
Comment
: knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE:
404 (Improper Resource Shutdown or Release)
References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331 (CONFIRM)
https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html (MISC)
[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update ()
CVE: CVE-2020-12667
CVE: CVE-2020-12667
Id:
CVE-2020-12667
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12667
Comment
: Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSSv3 Score:
7.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE:
400 (Uncontrolled Resource Consumption ('Resource Exhaustion'))
References:
https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/ (MISC)
https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html (CONFIRM)
[oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation (MLIST)
http://cyber-security-group.cs.tau.ac.il/# (MISC)
FEDORA-2020-bf68101ad3 ()
[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update ()
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