7.5
CWE
770
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-50387: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilities

First published: Mon Feb 12 2024(Updated: )

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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2022
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2022, 23H2 Edition
Microsoft Windows Server 2022
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2019
Microsoft Windows Server 2016
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Microsoft Windows Server 2012
Redhat Enterprise Linux=6.0
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows Server 2012 R2
Fedoraproject Fedora=39
Thekelleys Dnsmasq<2.90
Nic Knot Resolver<5.71
PowerDNS Recursor>=4.8.0<4.8.6
PowerDNS Recursor>=4.9.0<4.9.3
PowerDNS Recursor>=5.0.0<5.0.2
ISC BIND>=9.0.0<=9.16.46
ISC BIND>=9.18.0<=9.18.22
ISC BIND>=9.19.0<=9.19.20
Nlnetlabs Unbound<1.19.1
ubuntu/bind9<1:9.11.3+dfsg-1ubuntu1.19+
1:9.11.3+dfsg-1ubuntu1.19+
ubuntu/bind9<1:9.16.48-0ubuntu0.20.04.1
1:9.16.48-0ubuntu0.20.04.1
ubuntu/bind9<1:9.18.18-0ubuntu0.22.04.2
1:9.18.18-0ubuntu0.22.04.2
ubuntu/bind9<1:9.18.18-0ubuntu2.1
1:9.18.18-0ubuntu2.1
ubuntu/bind9<1:9.9.5.dfsg-3ubuntu0.19+
1:9.9.5.dfsg-3ubuntu0.19+
ubuntu/bind9<9.16.48<9.18.24<9.19.21
9.16.48
9.18.24
9.19.21
ubuntu/bind9<1:9.10.3.dfsg.
1:9.10.3.dfsg.
ubuntu/dnsmasq<2.90-0ubuntu0.20.04.1
2.90-0ubuntu0.20.04.1
ubuntu/dnsmasq<2.90-0ubuntu0.22.04.1
2.90-0ubuntu0.22.04.1
ubuntu/dnsmasq<2.90-0ubuntu0.23.10.1
2.90-0ubuntu0.23.10.1
ubuntu/dnsmasq<2.90
2.90
ubuntu/knot-resolver<5.7.1-1
5.7.1-1
ubuntu/pdns-recursor<4.9.3-1
4.9.3-1
ubuntu/unbound<1.9.4-2ubuntu1.5
1.9.4-2ubuntu1.5
ubuntu/unbound<1.13.1-1ubuntu5.4
1.13.1-1ubuntu5.4
ubuntu/unbound<1.17.1-2ubuntu0.1
1.17.1-2ubuntu0.1
ubuntu/unbound<1.19.1-1
1.19.1-1
redhat/bind<9.16.48
9.16.48
redhat/bind<9.18.24
9.18.24
redhat/bind<9.19.21
9.19.21
debian/bind9<=1:9.11.5.P4+dfsg-5.1+deb10u7<=1:9.11.5.P4+dfsg-5.1+deb10u10<=1:9.16.44-1~deb11u1<=1:9.18.19-1~deb12u1
1:9.16.48-1
1:9.18.24-1
1:9.19.21-1
debian/dnsmasq<=2.80-1+deb10u1<=2.85-1<=2.89-1
2.90-2
2.90-3
debian/knot-resolver<=3.2.1-3<=3.2.1-3+deb10u1<=5.3.1-1+deb11u1<=5.6.0-1
5.6.0-1+deb12u1
5.7.1-1
5.7.2-1
debian/pdns-recursor<=4.1.11-1+deb10u1<=4.4.2-3<=4.8.4-1
4.8.7-1
4.9.3-1
4.9.4-1
debian/systemd<=241-7~deb10u8<=241-7~deb10u10<=247.3-7+deb11u4<=252.22-1~deb12u1
255.4-1
debian/unbound<=1.9.0-2+deb10u2<=1.13.1-1+deb11u1<=1.17.1-2+deb12u1
1.9.0-2+deb10u4
1.13.1-1+deb11u2
1.17.1-2+deb12u2
1.19.1-1
1.19.2-1

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