ALT-PU-2024-2455-2
Closed vulnerabilities
Published: 2024-02-13
BDU:2024-01359
Уязвимость компонента DNSSEC реализации протокола DNS сервера DNS BIND, позволяющая нарушителю вызвать отказ в обслуживании
Severity: HIGH (7.5)
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References:
Published: 2024-02-14
Modified: 2025-05-12
Modified: 2025-05-12
CVE-2023-50387
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.
Severity: HIGH (7.5)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References:
- [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
- https://access.redhat.com/security/cve/CVE-2023-50387
- https://bugzilla.suse.com/show_bug.cgi?id=1219823
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
- https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
- https://kb.isc.org/docs/cve-2023-50387
- [debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update
- [debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security update
- FEDORA-2024-c967c7d287
- FEDORA-2024-e24211eff0
- FEDORA-2024-c36c448396
- FEDORA-2024-e00eceb11c
- FEDORA-2024-21310568fa
- FEDORA-2024-499b9be35f
- FEDORA-2024-2e26eccfcb
- FEDORA-2024-b0f9656a76
- FEDORA-2024-4e36df9dfd
- FEDORA-2024-fae88b73eb
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387
- https://news.ycombinator.com/item?id=39367411
- https://news.ycombinator.com/item?id=39372384
- https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
- https://security.netapp.com/advisory/ntap-20240307-0007/
- https://www.athene-center.de/aktuelles/key-trap
- https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf
- https://www.isc.org/blogs/2024-bind-security-release/
- https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/
- https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities
- https://www.theregister.com/2024/02/13/dnssec_vulnerability_internet/
- https://www.securityweek.com/keytrap-dns-attack-could-disable-large-parts-of-internet-researchers/
- https://www.isc.org/blogs/2024-bind-security-release/
- https://www.athene-center.de/fileadmin/content/PDF/Technical_Report_KeyTrap.pdf
- https://www.athene-center.de/aktuelles/key-trap
- https://security.netapp.com/advisory/ntap-20240307-0007/
- https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
- https://news.ycombinator.com/item?id=39372384
- https://news.ycombinator.com/item?id=39367411
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-50387
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
- FEDORA-2024-fae88b73eb
- FEDORA-2024-4e36df9dfd
- FEDORA-2024-b0f9656a76
- FEDORA-2024-2e26eccfcb
- FEDORA-2024-499b9be35f
- FEDORA-2024-21310568fa
- FEDORA-2024-e00eceb11c
- FEDORA-2024-c36c448396
- FEDORA-2024-e24211eff0
- FEDORA-2024-c967c7d287
- [debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security update
- [debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update
- https://kb.isc.org/docs/cve-2023-50387
- https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
- https://bugzilla.suse.com/show_bug.cgi?id=1219823
- https://access.redhat.com/security/cve/CVE-2023-50387
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities
Published: 2024-02-14
Modified: 2025-05-12
Modified: 2025-05-12
CVE-2023-50868
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:
- [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
- https://access.redhat.com/security/cve/CVE-2023-50868
- https://bugzilla.suse.com/show_bug.cgi?id=1219826
- https://datatracker.ietf.org/doc/html/rfc5155
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
- https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
- https://kb.isc.org/docs/cve-2023-50868
- [debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update
- [debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security update
- FEDORA-2024-c967c7d287
- FEDORA-2024-e24211eff0
- FEDORA-2024-c36c448396
- FEDORA-2024-e00eceb11c
- FEDORA-2024-21310568fa
- FEDORA-2024-499b9be35f
- FEDORA-2024-2e26eccfcb
- FEDORA-2024-b0f9656a76
- FEDORA-2024-4e36df9dfd
- FEDORA-2024-fae88b73eb
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
- https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
- https://security.netapp.com/advisory/ntap-20240307-0008/
- https://www.isc.org/blogs/2024-bind-security-release/
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities
- https://www.isc.org/blogs/2024-bind-security-release/
- https://security.netapp.com/advisory/ntap-20240307-0008/
- https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
- FEDORA-2024-fae88b73eb
- FEDORA-2024-4e36df9dfd
- FEDORA-2024-b0f9656a76
- FEDORA-2024-2e26eccfcb
- FEDORA-2024-499b9be35f
- FEDORA-2024-21310568fa
- FEDORA-2024-e00eceb11c
- FEDORA-2024-c36c448396
- FEDORA-2024-e24211eff0
- FEDORA-2024-c967c7d287
- [debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security update
- [debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security update
- https://kb.isc.org/docs/cve-2023-50868
- https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
- https://datatracker.ietf.org/doc/html/rfc5155
- https://bugzilla.suse.com/show_bug.cgi?id=1219826
- https://access.redhat.com/security/cve/CVE-2023-50868
- [oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities
Closed bugs
Просьба обновить до версии 1.19.1.