CVE-2023-32726: Possible buffer overread from reading DNS responses
First published: Mon Dec 18 2023(Updated: )
The vulnerability is caused by improper check for check if RDLENGTH does not overflow the buffer in response from DNS server.
Credit: security@zabbix.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zabbix Agent | >=5.0.0<=5.0.39 | |
| Zabbix Agent | >=6.0.0<=6.0.23 | |
| Zabbix Agent | >=6.4.0<=6.4.8 | |
| Zabbix Agent | =7.0.0-alpha1 | |
| Zabbix Agent | =7.0.0-alpha6 |
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Reference Links
- https://support.zabbix.com/browse/ZBX-23855
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UMFKNV5E4LG2DIZNPRWQ2ENH75H6UEQT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BYSYLA7VTHR25CBLYO5ZLEJFGU7HTHQB/
- https://lists.debian.org/debian-lts-announce/2024/01/msg00012.html
Frequently Asked Questions
What is the severity of CVE-2023-32726?
The severity of CVE-2023-32726 is classified as a medium vulnerability.
How do I fix CVE-2023-32726?
To fix CVE-2023-32726, upgrade the Zabbix agent to a version that is not affected, such as versions above 5.0.39, 6.0.23, or 6.4.8.
What software is affected by CVE-2023-32726?
CVE-2023-32726 affects Zabbix agent versions 5.0.0 to 5.0.39, 6.0.0 to 6.0.23, and 6.4.0 to 6.4.8, along with specific alpha versions.
What causes CVE-2023-32726?
CVE-2023-32726 is caused by improper checks for RDLENGTH that may lead to buffer overflow in responses from DNS servers.
Is CVE-2023-32726 related to other vulnerabilities?
CVE-2023-32726 is closely related to vulnerabilities dealing with DNS response handling and buffer overflow issues.
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- agent/references
- collector/mitre-cve
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- agent/last-modified-date
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/zabbix
- canonical/zabbix agent
- version/zabbix agent/5.0.0
- version/zabbix agent/5.0.39
- version/zabbix agent/6.0.0
- version/zabbix agent/6.0.23
- version/zabbix agent/6.4.0
- version/zabbix agent/6.4.8
- version/zabbix agent/7.0.0-alpha1
- version/zabbix agent/7.0.0-alpha6