Severity
7.5HIGH
EPSS
0.1%
top 65.45%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 23
Latest updateAug 15

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

Alpinebind< 9.18.31-r0+6
Debianbind9< 1:9.16.50-1~deb11u1+3
CVEListV5isc/bind_99.0.09.11.37+6

🔴Vulnerability Details

7
OSV
bind9 vulnerabilities2024-08-15
OSV
bind9 vulnerabilities2024-08-01
GHSA
GHSA-xv2w-3fww-7hvf: 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 cac2024-07-23
OSV
CVE-2024-1975: 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 cac2024-07-23
OSV
CVE-2024-1975: 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 cac2024-07-23

📋Vendor Advisories

6
Ubuntu
Bind vulnerabilities2024-08-15
Ubuntu
Bind vulnerabilities2024-08-01
Red Hat
bind9: bind: SIG(0) can be used to exhaust CPU resources2024-07-23
Ubuntu
Bind vulnerabilities2024-07-23
Microsoft
SIG(0) can be used to exhaust CPU resources2024-07-09