Memory leak in ECDSA DNSSEC verification code
CVE-2022-38177

7.5HIGH

Key Information:

Vendor

Isc
Status
Bind9
Vendor
CVE Published:
21 September 2022

Badges

👾 Exploit Exists

What is CVE-2022-38177?

By spoofing the target resolver with responses that have a malformed ECDSA 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.

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Deploy the Patch

Affected Version(s)

BIND9 Open Source Branches 9.8 through 9.16 9.8.4 through versions before 9.16.33

BIND9 Supported Preview Branches 9.9-S through 9.11-S 9.9.4-S1 through versions up to and including 9.11.37-S1

BIND9 Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1

References

https://kb.isc.org/docs/cve-2022-38177
http://www.openwall.com/lists/oss-security/2022/09/21/3
mailing-list
https://www.debian.org/security/2022/dsa-5235
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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