CVE-2023-2911
First published: Wed Jun 21 2023(Updated: )
If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow. This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
Credit: security-officer@isc.org security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/bind9 | <1:9.16.1-0ubuntu2.15 | 1:9.16.1-0ubuntu2.15 |
| ubuntu/bind9 | <1:9.18.12-0ubuntu0.22.04.2 | 1:9.18.12-0ubuntu0.22.04.2 |
| ubuntu/bind9 | <1:9.18.12-0ubuntu0.22.10.2 | 1:9.18.12-0ubuntu0.22.10.2 |
| ubuntu/bind9 | <1:9.18.12-1ubuntu1.1 | 1:9.18.12-1ubuntu1.1 |
| ubuntu/bind9 | <9.16.42<9.18.16 | 9.16.42 9.18.16 |
| ubuntu/bind9 | <1:9.18.12-1ubuntu2 | 1:9.18.12-1ubuntu2 |
| debian/bind9 | 1:9.11.5.P4+dfsg-5.1+deb10u7 1:9.11.5.P4+dfsg-5.1+deb10u10 1:9.16.44-1~deb11u1 1:9.16.48-1 1:9.18.19-1~deb12u1 1:9.18.24-1 1:9.19.21-1 | |
| ISC BIND | >=9.16.33<=9.16.41 | |
| ISC BIND | >=9.16.33<=9.16.41 | |
| ISC BIND | >=9.18.7<=9.18.15 | |
| ISC BIND | >=9.18.11<=9.18.15 | |
| Debian Debian Linux | =11.0 | |
| Debian Debian Linux | =12.0 | |
| Fedoraproject Fedora | =37 | |
| Fedoraproject Fedora | =38 | |
| Netapp Active Iq Unified Manager Vmware Vsphere | ||
| All of | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| All of | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| All of | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| All of | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| All of | ||
| Netapp H500s Firmware | ||
| Netapp H500s | ||
| Netapp H700s Firmware | ||
| Netapp H700s | ||
| Netapp H300s Firmware | ||
| Netapp H300s | ||
| Netapp H410c Firmware | ||
| Netapp H410c | ||
| Netapp H410s Firmware | ||
| Netapp H410s | ||
| Netapp H500s Firmware | ||
| Netapp H500s |
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://kb.isc.org/docs/cve-2023-2911
- http://www.openwall.com/lists/oss-security/2023/06/21/6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/
- https://www.debian.org/security/2023/dsa-5439
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SEFCEVCTYEMKTWA7V7EYPI5YQQ4JWDLI/
- https://security.netapp.com/advisory/ntap-20230703-0010/
- https://launchpad.net/bugs/cve/CVE-2023-2911
- https://downloads.isc.org/isc/bind9/9.18.16/patches/0003-CVE-2023-2911.patch
- https://downloads.isc.org/isc/bind9/9.16.42/patches/0003-CVE-2023-2911.patch
- https://security-tracker.debian.org/tracker/CVE-2023-2911
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2911
- https://kb.isc.org/v1/docs/cve-2023-2911
- https://ubuntu.com/security/notices/USN-6183-1
- https://nvd.nist.gov/vuln/detail/CVE-2023-2911
- https://ubuntu.com/security/CVE-2023-2911
Frequently Asked Questions
What is CVE-2023-2911?
CVE-2023-2911 is a vulnerability that affects BIND 9 resolvers configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`.
How does CVE-2023-2911 affect BIND 9?
CVE-2023-2911 can cause `named` to loop and terminate unexpectedly due to a stack overflow if the `recursive-clients` quota is reached.
Which versions of BIND 9 are affected by CVE-2023-2911?
BIND 9 versions 9.16.1-0ubuntu2.15, 9.18.12-0ubuntu0.22.04.2, 9.18.12-0ubuntu0.22.10.2, 9.18.12-1ubuntu1.1, 9.16.42, 9.18.16, 9.11.5.P4+dfsg-5.1+deb10u7, 9.11.5.P4+dfsg-5.1+deb10u9, 9.16.44-1~deb11u1, 9.18.16-1~deb12u1, 9.18.19-1~deb12u1, and 9.19.17 are affected.
What is the severity of CVE-2023-2911?
The severity of CVE-2023-2911 is not specified in the provided information.
How do I fix CVE-2023-2911?
To fix CVE-2023-2911, update BIND 9 to a version that includes the necessary security patch.
Where can I find more information about CVE-2023-2911?
You can find more information about CVE-2023-2911 at the following references: - [ISC Knowledge Base](https://kb.isc.org/docs/cve-2023-2911) - [Openwall Mailing List](http://www.openwall.com/lists/oss-security/2023/06/21/6) - [Fedora Project Package Announce Mailing List](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3K6AJK7RRSR53HRF5GGKPA6PDUDWOD2/)
- agent/first-publish-date
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/type
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/software-canonical-lookup
- agent/weakness
- agent/remedy
- agent/references
- agent/severity
- agent/tags
- agent/event
- agent/description
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/ubuntu
- package-manager/debian
- vendor/isc
- canonical/isc bind
- version/isc bind/9.16.33
- version/isc bind/9.16.41
- version/isc bind/9.18.7
- version/isc bind/9.18.15
- version/isc bind/9.18.11
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0
- version/debian debian linux/12.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/37
- version/fedoraproject fedora/38
- vendor/netapp
- canonical/netapp active iq unified manager vmware vsphere
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h410c firmware
- canonical/netapp h410c
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h500s firmware
- canonical/netapp h500s