7.5

CVE-2023-50387: fedoraproject fedora

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2023-50387UBUNTU-CVE-2023-50387DEBIAN-CVE-2023-50387
Published 14-02-2024Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2023-50387 is a high (CVSS 7.5) vulnerability in fedoraproject fedora. EPSS estimates a 99.99% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities.

Overall risk
50/100
0100
High · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
99.99%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 64 · Related 23
DLA-3736-1DLA-3816-1DLA-3859-1DLA-3974-1DSA-5620-1DSA-5621-1

Timeline

  1. 14-02-2024
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

99.99%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 99.99% on 19-09-2026

19-09-202619-10-2026
EPSS score
99.99%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian7 products
  • bind9< 1:9.18.24-1 | < 1:9.19.21-1
  • dnsjavaAll versions (No fix recorded) | < 3.6.2-1
  • dnsmasq< 2.90-4~deb12u1 | < 2.90-1
  • knot-resolver< 5.6.0-1+deb12u1 | < 5.7.1-1
  • pdns-recursor< 4.8.6-1 | < 4.9.3-1
Ubuntu7 products
  • bind9< 1:9.9.5.dfsg-3ubuntu0.19+esm12 | < 1:9.10.3.dfsg.P4-8ubuntu1.19+esm8 | < 1:9.11.3+dfsg-1ubuntu1.19+esm3 | < 1:9.16.48-0ubuntu0.20.04.1 | < 1:9.18.18-0ubuntu0.22.04.2
  • bind9-libsAll versions (No fix recorded)
  • dnsmasq< 2.90-0ubuntu0.16.04.1+esm1 | < 2.90-0ubuntu0.18.04.1+esm1 | < 2.90-0ubuntu0.20.04.1 | < 2.90-0ubuntu0.22.04.1
  • isc-dhcpAll versions (No fix recorded)
  • knot-resolverAll versions (No fix recorded)
Microsoft6 products
Alpine3 products
  • bind≥ 9.0.0, < 9.16.48-r0 | ≥ 9.0.0, < 9.18.24-r0
  • dnsmasq< 2.90-r0
  • unbound< 1.19.1-r0
Opensuse2 products
  • dnsmasq&distro=openSUSE Tumbleweed< 2.90-1.1
  • pdns-recursor&distro=openSUSE Tumbleweed< 5.0.2-1.1
Chainguard1 product
  • bind< 9.18.24-r0
Fedoraproject1 product
Isc1 product
  • bind≥ 9.0.0, ≤ 9.16.46 | ≥ 9.18.0, ≤ 9.18.22 | ≥ 9.19.0, ≤ 9.19.20
Nic1 product
Nlnetlabs1 product
Powerdns1 product
  • recursor≥ 4.8.0, < 4.8.6 | ≥ 4.9.0, < 4.9.3 | ≥ 5.0.0, < 5.0.2
Redhat1 product
Thekelleys1 product
Wolfi1 product
  • bind< 9.18.24-r0

14 vendors · 34 products

References

52 links
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