CVE-2024-1975

SIG(0) can be used to exhaust CPU resources

High · published July 23, 2024

CVSS v3.1
7.5
EPSS
2%
Percentile
81.7
In the wild
Unconfirmed
What it is

If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests.

This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.02114 · 81.7th percentile
Published
2024-07-23T14:38Z
EPSS history
Timeline
  • 23 JUL 14:38Z
    SIG(0) can be used to exhaust CPU resources
    cvelistv5