Debian update for bind9



| Updated: 2023-02-02
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2022-3094
CVE-2022-3736
CVE-2022-3924
CWE-ID CWE-400
CWE-20
CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Debian Linux
Operating systems & Components / Operating system

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

Vendor Debian

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU71529

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-2022-3094

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 when handling DNS updates. A remote attacker can trigger resource exhaustion by sending a flood of dynamic DNS updates.

Mitigation

Update bind9 package to version 1:9.16.37-1~deb11u1.

Vulnerable software versions

Debian Linux: All versions

bind9 (Debian package): before 1:9.16.37-1~deb11u1

CPE2.3 External links

https://www.debian.org/security/2023/dsa-5329


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) Input validation error

EUVDB-ID: #VU71530

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-3736

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted RRSIG query to the DNS server and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that stale cache and stale answers are enabled, option stale-answer-client-timeout is set to a positive integer, and the resolver receives an RRSIG query.

Mitigation

Update bind9 package to version 1:9.16.37-1~deb11u1.

Vulnerable software versions

Debian Linux: All versions

bind9 (Debian package): before 1:9.16.37-1~deb11u1

CPE2.3 External links

https://www.debian.org/security/2023/dsa-5329


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) Reachable Assertion

EUVDB-ID: #VU71531

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-2022-3924

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. A remote attacker can send specially crafted queries to the resolver and perform a denial of service (DoS) attack.

Mitigation

Update bind9 package to version 1:9.16.37-1~deb11u1.

Vulnerable software versions

Debian Linux: All versions

bind9 (Debian package): before 1:9.16.37-1~deb11u1

CPE2.3 External links

https://www.debian.org/security/2023/dsa-5329


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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