Vulnerability · Published Dec 12, 2023 · Assigned by canonical
CVE-2023-5536
Medium 5.0
In plain English
A medium-severity security flaw in Ubuntu Server from Canonical. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)5.0Medium
Exploit odds (30 days)0.2%top 84.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official description
A feature in LXD (LP#1829071), affects the default configuration of Ubuntu Server which allows privileged users in the lxd group to escalate their privilege to root without requiring a sudo password.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | cloud-init | no fix listed | UBUNTU-CVE-2023-5536 |
| Ubuntu:22.04:LTS | subiquity | no fix listed | UBUNTU-CVE-2023-5536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Server | see references |
References
- https://discourse.ubuntu.com/t/easy-multi-user-lxd-setup/26215/4 mitigation
- https://ubuntu.com/security/CVE-2023-5536 issue-tracking
- https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1829071 issue-tracking
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5536 issue-tracking