CVE-2022-38178

Memory leaks in EdDSA DNSSEC verification code

Description

By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.

Remediation

Solution:

  • Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.33, BIND 9.18.7, BIND 9.19.5, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.16.33-S1.

Workaround:

  • Disable the following algorithms in your configuration using the disable-algorithms option: ED25519, ED448. Note that this causes zones signed with these algorithms to be treated as insecure.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.66% Top 30%
Vendor Advisory debian.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: ISC BIND9
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2022-38178 third party advisory mailing list
http://www.openwall.com/lists/oss-security/2022/09/21/3 third party advisory mailing list patch
https://www.debian.org/security/2022/dsa-5235 vendor advisory third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4GQWBPF7Y52J2FA24U6UMHQAOXZEF7/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MRHB6J4Z7BKH4HPEKG5D35QGRD6ANNMT/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZJQNUASODNVAWZV6STKG5SD6XIJ446S/ vendor advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00007.html third party advisory mailing list
https://security.gentoo.org/glsa/202210-25 vendor advisory third party advisory
https://security.netapp.com/advisory/ntap-20221228-0009/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2022-38178?
CVE-2022-38178 has been scored as a high severity vulnerability.
How to fix CVE-2022-38178?
To fix CVE-2022-38178: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.33, BIND 9.18.7, BIND 9.19.5, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.16.33-S1.
Is CVE-2022-38178 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-38178 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-38178?
CVE-2022-38178 affects ISC BIND9.
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