Ubuntu update for bind9
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 6 |
| CVE-ID | CVE-2022-2795 CVE-2022-2881 CVE-2022-2906 CVE-2022-3080 CVE-2022-38177 CVE-2022-38178 |
| CWE-ID | CWE-399 CWE-125 CWE-401 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
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 6 vulnerabilities.
1) Resource management error
EUVDB-ID: #VU67545
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-2795
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe 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 processing large delegations. A remote attacker can flood the target resolver with queries and perform a denial of service (DoS) attack.
MitigationUpdate the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
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) Out-of-bounds read
EUVDB-ID: #VU67546
Risk: Medium
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-2881
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition when reusing HTTP connection while requesting statistics from the stats channel. A remote DNS server under attacker's control trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service attack.
Update the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Memory leak
EUVDB-ID: #VU67547
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-2906
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in key processing when using TKEY records in Diffie-Hellman mode with OpenSSL 3.0.0 and later versions. A remote attacker can force the application to leak memory and perform denial of service attack.
MitigationUpdate the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
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) Input validation error
EUVDB-ID: #VU67548
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-3080
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error when resolvers are configured to answer from stale cache with zero stale-answer-client-timeout and there is a stale CNAME in the cache for an incoming query. A remote attacker can send a specially crafted request to the DNS resolver and perform a denial of service (DoS) attack.
MitigationUpdate the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
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.
5) Memory leak
EUVDB-ID: #VU67549
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-38177
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in the DNSSEC verification code for the ECDSA algorithm. A remote attacker can spoof the target resolver with responses that have a malformed ECDSA signature and perform denial of service attack.
MitigationUpdate the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
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.
6) Memory leak
EUVDB-ID: #VU67550
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-38178
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in the DNSSEC verification code for the EdDSA algorithm. A remote attacker can spoof the target resolver with responses that have a malformed EdDSA signature and perform denial of service attack.
MitigationUpdate the affected package bind9 to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 22.04
bind9 (Ubuntu package): before 1:9.18.1-1ubuntu1.2
External linkshttp://ubuntu.com/security/notices/USN-5626-1
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.
