Ubuntu update for bind9



Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2024-0760
CVE-2024-1737
CVE-2024-1975
CVE-2024-4076
CWE-ID CWE-400
CWE-399
CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

bind9 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU94709

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-0760

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by sending a flood of DNS messages over TCP and perform a denial of service (DoS) attack.

Mitigation

Update the affected package bind9 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.04

bind9 (Ubuntu package): before 1:9.18.28-0ubuntu0.20.04.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6909-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Resource management error

EUVDB-ID: #VU94710

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-1737

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when handling a very large number of RRs. Resolver caches and authoritative zone databases that hold significant numbers of RRs for the same hostname (of any RTYPE) can suffer from degraded performance as content is being added or updated, and also when handling client queries for this name.

Mitigation

Update the affected package bind9 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.04

bind9 (Ubuntu package): before 1:9.18.28-0ubuntu0.20.04.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6909-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource exhaustion

EUVDB-ID: #VU94711

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-1975

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. 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.

Mitigation

Update the affected package bind9 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.04

bind9 (Ubuntu package): before 1:9.18.28-0ubuntu0.20.04.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6909-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Reachable assertion

EUVDB-ID: #VU94713

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-4076

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when serving both stale cache data and authoritative zone content. A remote attacker can send specially crafted queries to the DNS server to trigger an assertion failure and perform a denial of service (DoS) attack.

Mitigation

Update the affected package bind9 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 24.04

bind9 (Ubuntu package): before 1:9.18.28-0ubuntu0.20.04.1

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6909-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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