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
AI Score
Confidence
High
EPSS
Percentile
92.9%
Medium
Canonical Ubuntu
Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered that Bind incorrectly handled parsing large DNS messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-4408) Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered that Bind icorrectly handled validating DNSSEC messages. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-50387) It was discovered that Bind incorrectly handled preparing an NSEC3 closest encloser proof. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. (CVE-2023-50868) It was discovered that Bind incorrectly handled reverse zone queries when nxdomain-redirect is enabled. A remote attacker could possibly use this issue to cause Bind to crash, leading to a denial of service. (CVE-2023-5517) It was discovered that Bind incorrectly handled recursive resolution when both DNS64 and serve-stable were enabled. A remote attacker could possibly use this issue to cause Bind to crash, leading to a denial of service. (CVE-2023-5679) Update Instructions: Run sudo pro fix USN-6633-1
to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: dnsutils – 1:9.18.18-0ubuntu0.22.04.2 bind9-libs – 1:9.18.18-0ubuntu0.22.04.2 bind9utils – 1:9.18.18-0ubuntu0.22.04.2 bind9-dev – 1:9.18.18-0ubuntu0.22.04.2 bind9-doc – 1:9.18.18-0ubuntu0.22.04.2 bind9-utils – 1:9.18.18-0ubuntu0.22.04.2 bind9 – 1:9.18.18-0ubuntu0.22.04.2 bind9-dnsutils – 1:9.18.18-0ubuntu0.22.04.2 bind9-host – 1:9.18.18-0ubuntu0.22.04.2 No subscription required
CVEs contained in this USN include: CVE-2023-4408, CVE-2023-50387, CVE-2023-50868, CVE-2023-5517, CVE-2023-5679.
Severity is medium unless otherwise noted.
Users of affected products are strongly encouraged to follow the mitigations below.
The Cloud Foundry project recommends upgrading the following releases:
2024-02-29: Initial vulnerability report published.
Vendor | Product | Version | CPE |
---|---|---|---|
cloudfoundry | cflinuxfs4 | * | cpe:2.3:a:cloudfoundry:cflinuxfs4:*:*:*:*:*:*:*:* |
cloudfoundry | jammy_stemcells | * | cpe:2.3:a:cloudfoundry:jammy_stemcells:*:*:*:*:*:*:*:* |
cloudfoundry | cf-deployment | * | cpe:2.3:a:cloudfoundry:cf-deployment:*:*:*:*:*:*:*:* |
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
AI Score
Confidence
High
EPSS
Percentile
92.9%