CVE-2023-5871: Libnbd: malicious nbd server may crash libnbd
A flaw was found in libnbd, due to a malicious Network Block Device (NBD), a protocol for accessing Block Devices such as hard disks over a Network. This issue may allow a malicious NBD server to cause a Denial of Service.
Other sources
A malicious NBD server can easily crash libnbd
Refer: https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/libnbdto a version that resolves this vulnerability.Fixed in 1.18.2 - Upgrade
Upgrade
debian/libnbdto a version that resolves this vulnerability.Fixed in 1.18.1-1 - Upgrade
Upgrade
debian/libnbdto a version that resolves this vulnerability.Fixed in 1.14.2-1Fixed in 1.22.2-1Fixed in 1.24.4-1
Event History
Frequently Asked Questions
What is the vulnerability ID for this flaw?
The vulnerability ID for this flaw is CVE-2023-5871.
What is the severity of CVE-2023-5871?
The severity of CVE-2023-5871 is high with a CVSS score of 7.5.
How does this vulnerability affect libnbd?
This vulnerability affects libnbd by allowing a malicious NBD server to crash it, potentially causing a Denial of Service.
What is the affected version of libnbd?
The affected version of libnbd is 1.18.2.
How can I fix CVE-2023-5871?
To fix CVE-2023-5871, update libnbd to version 1.18.2 or higher.