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Debian Security Bug TrackerDEBIANCVE:CVE-2023-50387HistoryFeb 14, 2024 - 4:15 p.m.
CVE-2023-50387
2024-02-1416:15:45
Debian Security Bug Tracker
security-tracker.debian.org
40
dns protocol
rfc 4033
rfc 4034
rfc 4035
rfc 6840
keytrap issue
remote attackers
cpu consumption
dnssec
denial of service
zone
algorithm
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.7 High
AI Score
Confidence
High
0.05 Low
EPSS
Percentile
92.9%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | bind9 | < 1:9.18.24-1 | bind9_1:9.18.24-1_all.deb |
| Debian | 11 | all | bind9 | < 1:9.16.48-1 | bind9_1:9.16.48-1_all.deb |
| Debian | 10 | all | bind9 | < 1:9.11.5.P4+dfsg-5.1+deb10u11 | bind9_1:9.11.5.P4+dfsg-5.1+deb10u11_all.deb |
| Debian | 999 | all | bind9 | < 1:9.19.21-1 | bind9_1:9.19.21-1_all.deb |
| Debian | 13 | all | bind9 | < 1:9.19.21-1 | bind9_1:9.19.21-1_all.deb |
| Debian | 12 | all | dnsmasq | <= 2.89-1 | dnsmasq_2.89-1_all.deb |
| Debian | 11 | all | dnsmasq | <= 2.85-1 | dnsmasq_2.85-1_all.deb |
| Debian | 10 | all | dnsmasq | <= 2.80-1+deb10u1 | dnsmasq_2.80-1+deb10u1_all.deb |
| Debian | 999 | all | dnsmasq | < 2.90-1 | dnsmasq_2.90-1_all.deb |
| Debian | 13 | all | dnsmasq | < 2.90-1 | dnsmasq_2.90-1_all.deb |
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CVE-2023-50387 affecting package bind for versions less than 9.16.48-1
2024-03-05 17:52:42
CVE-2023-50387 affecting package unbound for versions less than 1.19.1-1
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CVE-2023-50387 affecting package bind for versions less than 9.19.21-1
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7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.7 High
AI Score
Confidence
High
0.05 Low
EPSS
Percentile
92.9%
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