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Alpine Linux Development TeamALPINE:CVE-2023-50387HistoryFeb 14, 2024 - 4:15 p.m.
CVE-2023-50387
2024-02-1416:15:45
Alpine Linux Development Team
security.alpinelinux.org
61
dns protocol
dnssec
denial of service
cpu consumption
keytrap
rfc 4033
rfc 4034
rfc 4035
rfc 6840
remote attackers
zone
dnskey
rrsig
algorithm evaluation
CVSS3
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
8
Confidence
High
EPSS
0.05
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 |
|---|---|---|---|---|---|
| Alpine | edge-community | noarch | knot-resolver | < 5.7.1-r0 | UNKNOWN |
| Alpine | edge-community | noarch | pdns-recursor | < 5.0.2-r0 | UNKNOWN |
| Alpine | edge-main | noarch | bind | < 9.18.24-r0 | UNKNOWN |
| Alpine | edge-main | noarch | dnsmasq | < 2.90-r0 | UNKNOWN |
| Alpine | edge-main | noarch | unbound | < 1.19.1-r0 | UNKNOWN |
| Alpine | 3.16-main | noarch | bind | < 9.16.48-r0 | UNKNOWN |
| Alpine | 3.17-main | noarch | bind | < 9.18.24-r0 | UNKNOWN |
| Alpine | 3.17-main | noarch | dnsmasq | < 2.90-r0 | UNKNOWN |
| Alpine | 3.17-main | noarch | unbound | < 1.19.1-r0 | UNKNOWN |
| Alpine | 3.18-community | noarch | knot-resolver | < 5.7.1-r0 | UNKNOWN |
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CVSS3
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
8
Confidence
High
EPSS
0.05
Percentile
92.9%
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