Gentoo update for ISC BIND
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 9 |
| CVE-ID | CVE-2021-25219 CVE-2021-25220 CVE-2022-0396 CVE-2022-2795 CVE-2022-2881 CVE-2022-2906 CVE-2022-3080 CVE-2022-38177 CVE-2022-38178 |
| CWE-ID | CWE-400 CWE-350 CWE-399 CWE-125 CWE-401 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system net-dns/bind-tools Operating systems & Components / Operating system package or component net-dns/bind Operating systems & Components / Operating system package or component |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 9 vulnerabilities.
1) Resource exhaustion
EUVDB-ID: #VU57752
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25219
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to BIND does not properly control consumption of internal resources when processing lame cache. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationUpdate the affected packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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) Reliance on Reverse DNS Resolution for a Security-Critical Action
EUVDB-ID: #VU61422
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25220
CWE-ID:
CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to poison DNS cache.
The vulnerability exists due to an error in DNS forwarder implementation. When using forwarders, bogus NS records supplied by, or via, those forwarders may be cached and used by named if it needs to recurse for any reason, causing it to obtain and pass on potentially incorrect answers. The cache could become poisoned with incorrect records leading to
queries being made to the wrong servers, which might also result in
false information being returned to clients.
Update the affected packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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) Resource management error
EUVDB-ID: #VU61423
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-0396
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 that allows TCP connection slots to be consumed for an indefinite time
frame via a specifically crafted TCP stream sent from a client. A remote attacker can initiate a specially crafted TCP stream that can cause connections to BIND to remain in CLOSE_WAIT status for an indefinite period of time, even after the client has terminated the connection.
This issue can only be triggered on BIND servers which have keep-response-order enabled, which is not the default configuration. The keep-response-order option is an ACL block; any hosts which are specified within it will be able to trigger this issue on affected versions.
Update the affected packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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.
6) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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.
7) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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.
8) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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.
9) 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 packages.
net-dns/bind to version: 9.16.33
net-dns/bind-tools to version: 9.16.33
Gentoo Linux: All versions
net-dns/bind-tools: before 9.16.33
net-dns/bind: before 9.16.33
External linkshttp://security.gentoo.org/glsa/202210-25
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.
