CVE-2022-2795: Processing large delegations may severely degrade resolver performance
First published: Wed Sep 21 2022(Updated: )
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.
Credit: security-officer@isc.org security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/bind | <32:9.11.4-26.P2.el7_9.13 | 32:9.11.4-26.P2.el7_9.13 |
| redhat/bind9.16 | <32:9.16.23-0.14.el8 | 32:9.16.23-0.14.el8 |
| redhat/bind | <32:9.11.36-8.el8 | 32:9.11.36-8.el8 |
| redhat/bind | <32:9.16.23-11.el9 | 32:9.16.23-11.el9 |
| debian/bind9 | <=1:9.11.5.P4+dfsg-5.1+deb10u7 | 1:9.11.5.P4+dfsg-5.1+deb10u9 1:9.16.44-1~deb11u1 1:9.18.19-1~deb12u1 1:9.19.17-1 |
| ISC BIND | >=9.0.0<9.16.33 | |
| ISC BIND | >=9.18.0<9.18.7 | |
| ISC BIND | >=9.19.0<9.19.5 | |
| Isc Bind Supported Preview | =9.9.3-s1 | |
| ISC BIND | =9.9.3-s1 | |
| ISC BIND | =9.9.12-s1 | |
| ISC BIND | =9.9.13-s1 | |
| ISC BIND | =9.10.5-s1 | |
| ISC BIND | =9.10.7-s1 | |
| ISC BIND | =9.11.3-s1 | |
| Isc Bind Supported Preview | =9.11.5-s3 | |
| ISC BIND | =9.11.5-s3 | |
| ISC BIND | =9.11.5-s5 | |
| ISC BIND | =9.11.5-s6 | |
| ISC BIND | =9.11.6-s1 | |
| ISC BIND | =9.11.7-s1 | |
| ISC BIND | =9.11.8-s1 | |
| ISC BIND | =9.11.12-s1 | |
| ISC BIND | =9.11.14-s1 | |
| ISC BIND | =9.11.19-s1 | |
| ISC BIND | =9.11.21-s1 | |
| ISC BIND | =9.11.27-s1 | |
| ISC BIND | =9.11.29-s1 | |
| ISC BIND | =9.11.35-s1 | |
| ISC BIND | =9.11.37-s1 | |
| ISC BIND | =9.16.8-s1 | |
| ISC BIND | =9.16.11-s1 | |
| ISC BIND | =9.16.13-s1 | |
| ISC BIND | =9.16.21-s1 | |
| ISC BIND | =9.16.32-s1 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 | |
| Fedoraproject Fedora | =37 | |
| redhat/bind | <9.16.33 | 9.16.33 |
| redhat/bind | <9.18.7 | 9.18.7 |
| redhat/bind | <9.19.5 | 9.19.5 |
| >=9.0.0<9.16.33 | ||
| >=9.18.0<9.18.7 | ||
| >=9.19.0<9.19.5 | ||
| =9.9.3-s1 | ||
| =9.9.3-s1 | ||
| =9.9.12-s1 | ||
| =9.9.13-s1 | ||
| =9.10.5-s1 | ||
| =9.10.7-s1 | ||
| =9.11.3-s1 | ||
| =9.11.5-s3 | ||
| =9.11.5-s3 | ||
| =9.11.5-s5 | ||
| =9.11.5-s6 | ||
| =9.11.6-s1 | ||
| =9.11.7-s1 | ||
| =9.11.8-s1 | ||
| =9.11.12-s1 | ||
| =9.11.14-s1 | ||
| =9.11.19-s1 | ||
| =9.11.21-s1 | ||
| =9.11.27-s1 | ||
| =9.11.29-s1 | ||
| =9.11.35-s1 | ||
| =9.11.37-s1 | ||
| =9.16.8-s1 | ||
| =9.16.11-s1 | ||
| =9.16.13-s1 | ||
| =9.16.21-s1 | ||
| =9.16.32-s1 | ||
| =10.0 | ||
| =11.0 | ||
| =35 | ||
| =36 | ||
| =37 |
Remedy
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.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-2795 https://nvd.nist.gov/vuln/detail/CVE-2022-2795 https://kb.isc.org/docs/cve-2022-2795
- https://bugzilla.redhat.com/show_bug.cgi?id=2128584
- https://access.redhat.com/errata/RHSA-2023:0402
- https://access.redhat.com/errata/RHSA-2023:2792
- https://access.redhat.com/errata/RHSA-2023:3002
- https://access.redhat.com/errata/RHSA-2023:2261
- https://access.redhat.com/security/cve/cve-2022-2795
- https://kb.isc.org/docs/cve-2022-2795
- https://gitlab.isc.org/isc-projects/bind9/-/commit/e2014ba9e3b4236b0384ba17abfb2c9a155412f6
- https://gitlab.isc.org/isc-projects/bind9/-/commit/bf2ea6d8525bfd96a84dad221ba9e004adb710a8
- https://security-tracker.debian.org/tracker/CVE-2022-2795
- http://www.openwall.com/lists/oss-security/2022/09/21/3
- https://lists.debian.org/debian-lts-announce/2022/10/msg00007.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CV4GQWBPF7Y52J2FA24U6UMHQAOXZEF7/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MRHB6J4Z7BKH4HPEKG5D35QGRD6ANNMT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZJQNUASODNVAWZV6STKG5SD6XIJ446S/
- https://security.gentoo.org/glsa/202210-25
- https://www.debian.org/security/2022/dsa-5235
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2128705
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2128707
- https://access.redhat.com/errata/RHSA-2024:2720
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CV4GQWBPF7Y52J2FA24U6UMHQAOXZEF7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MRHB6J4Z7BKH4HPEKG5D35QGRD6ANNMT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZJQNUASODNVAWZV6STKG5SD6XIJ446S/
- https://security.netapp.com/advisory/ntap-20241129-0002/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID for this flaw?
The vulnerability ID for this flaw is CVE-2022-2795.
What is the severity of CVE-2022-2795?
The severity of CVE-2022-2795 is medium with a severity value of 5.3.
How does the vulnerability CVE-2022-2795 impact the target resolver?
The vulnerability CVE-2022-2795 allows an attacker to significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service.
What software versions are affected by CVE-2022-2795?
The software versions affected by CVE-2022-2795 include bind 9.16.33, bind 9.18.7, bind 9.19.5, and corresponding versions in Red Hat and Debian distributions.
Are there any known remedies for CVE-2022-2795?
Yes, there are known remedies for CVE-2022-2795 which include upgrading to specific versions of bind like 9.16.44-1~deb11u1 or applying patches provided by Red Hat and Debian.
- collector/redhat-cve
- collector/security-tracker-debian
- agent/first-publish-date
- agent/type
- agent/severity
- agent/weakness
- agent/description
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/remedy
- agent/title
- collector/mitre-cve
- source/MITRE
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/references
- agent/author
- agent/softwarecombine
- agent/tags
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2022-2795
- agent/last-modified-date
- agent/trending
- package-manager/redhat
- package-manager/debian
- vendor/isc
- canonical/isc bind
- version/isc bind/9.0.0
- version/isc bind/9.18.0
- version/isc bind/9.19.0
- canonical/isc bind supported preview
- version/isc bind supported preview/9.9.3-s1
- version/isc bind/9.9.3-s1
- version/isc bind/9.9.12-s1
- version/isc bind/9.9.13-s1
- version/isc bind/9.10.5-s1
- version/isc bind/9.10.7-s1
- version/isc bind/9.11.3-s1
- version/isc bind supported preview/9.11.5-s3
- version/isc bind/9.11.5-s3
- version/isc bind/9.11.5-s5
- version/isc bind/9.11.5-s6
- version/isc bind/9.11.6-s1
- version/isc bind/9.11.7-s1
- version/isc bind/9.11.8-s1
- version/isc bind/9.11.12-s1
- version/isc bind/9.11.14-s1
- version/isc bind/9.11.19-s1
- version/isc bind/9.11.21-s1
- version/isc bind/9.11.27-s1
- version/isc bind/9.11.29-s1
- version/isc bind/9.11.35-s1
- version/isc bind/9.11.37-s1
- version/isc bind/9.16.8-s1
- version/isc bind/9.16.11-s1
- version/isc bind/9.16.13-s1
- version/isc bind/9.16.21-s1
- version/isc bind/9.16.32-s1
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36
- version/fedoraproject fedora/37