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

Summary

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.

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:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database
.