CVE-2022-24750
What it is
UltraVNC is a free and open source remote pc access software. A vulnerability has been found in versions prior to 1.3.8.0 in which the DSM plugin module, which allows a local authenticated user to achieve local privilege escalation (LPE) on a vulnerable system. The vulnerability has been fixed to allow loading of plugins from the installed directory. Affected users should upgrade their UltraVNC to 1.3.8.1. Users unable to upgrade should not install and run UltraVNC server as a service. It is advisable to create a scheduled task on a low privilege account to launch WinVNC.exe instead. There are no known workarounds if winvnc needs to be started as a service.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-269 · Improper privilege management
- Record status
- Modified
Affected
- Uvnc Ultravnc < 1.3.8.1
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2022-24750.md and follow it. Check whether this project is affected by CVE-2022-24750. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE
- https://github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352
- https://github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g
- https://github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE
- https://github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352
- https://github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g
References
- https://github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE
- https://github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352
- https://github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g
- https://github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE
- https://github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352
- https://github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g