CVE-2022-2795
Processing large delegations may severely degrade resolver performance
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.
| Vendor | isc |
| Product | bind9 |
| Published | Sep 21, 2022 |
| Last Updated | Nov 29, 2024 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
ISC / BIND9
Open Source Branches 9.0 through 9.16 9.0.0 through versions before 9.16.33 Open Source Branch 9.18 9.18.0 through versions before 9.18.7 Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions up to and including 9.11.37-S1 Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.33-S1 Development Branch 9.19 9.19.0 through versions before 9.19.5
References
kb.isc.org: https://kb.isc.org/docs/cve-2022-2795 openwall.com: http://www.openwall.com/lists/oss-security/2022/09/21/3 debian.org: https://www.debian.org/security/2022/dsa-5235 lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4GQWBPF7Y52J2FA24U6UMHQAOXZEF7/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MRHB6J4Z7BKH4HPEKG5D35QGRD6ANNMT/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZJQNUASODNVAWZV6STKG5SD6XIJ446S/ lists.debian.org: https://lists.debian.org/debian-lts-announce/2022/10/msg00007.html security.gentoo.org: https://security.gentoo.org/glsa/202210-25 security.netapp.com: https://security.netapp.com/advisory/ntap-20241129-0002/
Credits
ISC would like to thank Yehuda Afek from Tel-Aviv University and Anat Bremler-Barr & Shani Stajnrod from Reichman University for bringing this vulnerability to our attention.