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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:267460
[Rus]
Version
1
Class
patch
ALTXid
500750
Language
English
Severity
High
Title
USN-6657-2 -- Dnsmasq vulnerabilities
Description
USN-6657-1 fixed several vulnerabilities in Dnsmasq. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Family
unix
Platform
Linux Mint 18.x
Linux Mint 19.x
Ubuntu 16.04
Ubuntu 18.04
Product
dnsmasq
Reference
VENDOR: USN-6657-2
VENDOR: USN-6657-2
Id:
USN-6657-2
Reference:
https://ubuntu.com/security/notices/USN-6657-2
CVE: CVE-2023-50387
CVE: CVE-2023-50387
Id:
CVE-2023-50387
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-50387
Comment
: Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.
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:
770 (Allocation of Resources Without Limits or Throttling)
References:
https://www.athene-center.de/aktuelles/key-trap ()
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ ()
https://kb.isc.org/docs/cve-2023-50387 ()
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html ()
https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/ ()
https://news.ycombinator.com/item?id=39367411 ()
https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/ ()
https://www.isc.org/blogs/2024-bind-security-release/ ()
https://news.ycombinator.com/item?id=39372384 ()
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 ()
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html ()
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387 ()
https://access.redhat.com/security/cve/CVE-2023-50387 ()
https://bugzilla.suse.com/show_bug.cgi?id=1219823 ()
https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf ()
[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities ()
[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities ()
FEDORA-2024-2e26eccfcb ()
FEDORA-2024-e24211eff0 ()
FEDORA-2024-21310568fa ()
[debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update ()
FEDORA-2024-b0f9656a76 ()
FEDORA-2024-4e36df9dfd ()
FEDORA-2024-499b9be35f ()
FEDORA-2024-c36c448396 ()
FEDORA-2024-c967c7d287 ()
FEDORA-2024-e00eceb11c ()
FEDORA-2024-fae88b73eb ()
https://security.netapp.com/advisory/ntap-20240307-0007/ ()
CVE: CVE-2023-50868
CVE: CVE-2023-50868
Id:
CVE-2023-50868
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-50868
Comment
: The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
References:
https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ ()
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html ()
https://www.isc.org/blogs/2024-bind-security-release/ ()
https://datatracker.ietf.org/doc/html/rfc5155 ()
https://kb.isc.org/docs/cve-2023-50868 ()
https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 ()
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html ()
https://access.redhat.com/security/cve/CVE-2023-50868 ()
https://bugzilla.suse.com/show_bug.cgi?id=1219826 ()
[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities ()
[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities ()
FEDORA-2024-2e26eccfcb ()
FEDORA-2024-e24211eff0 ()
FEDORA-2024-21310568fa ()
[debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update ()
FEDORA-2024-b0f9656a76 ()
FEDORA-2024-4e36df9dfd ()
FEDORA-2024-499b9be35f ()
FEDORA-2024-c36c448396 ()
FEDORA-2024-c967c7d287 ()
FEDORA-2024-e00eceb11c ()
FEDORA-2024-fae88b73eb ()
https://security.netapp.com/advisory/ntap-20240307-0008/ ()
CVE: CVE-2023-28450
CVE: CVE-2023-28450
Id:
CVE-2023-28450
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-28450
Comment
: An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
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
References:
https://capec.mitre.org/data/definitions/495.html (MISC)
https://thekelleys.org.uk/dnsmasq/doc.html (MISC)
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5 ()
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=blob%3Bf=CHANGELOG ()
FEDORA-2023-828bf01834 ()
FEDORA-2023-eeca11a4df ()
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