# CVE-2018-20023: italc-client: LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC...

CVE-2018-20023 is fixed in 7 products on 1 platform, first by libvncclient1 0.9.11+dfsg-1ubuntu1.1, released January 29, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-20023
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0250
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 18, 2018

## Description

LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | italc-client Ubuntu 18.04.6 LTS (bionic) | 1:3.0.3+dfsg1-3ubuntu0.1 | [italc-client 1:3.0.3+dfsg1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-italc-client-1-3.0.3-dfsg1-3ubuntu0.1.md) | Oct 29, 2019 |
| Linux | italc-management-console Ubuntu 18.04.6 LTS (bionic) | 1:3.0.3+dfsg1-3ubuntu0.1 | [italc-management-console 1:3.0.3+dfsg1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-italc-management-console-1-3.0.3-dfsg1-3ubuntu0.1.md) | Oct 29, 2019 |
| Linux | italc-master Ubuntu 18.04.6 LTS (bionic) | 1:3.0.3+dfsg1-3ubuntu0.1 | [italc-master 1:3.0.3+dfsg1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-italc-master-1-3.0.3-dfsg1-3ubuntu0.1.md) | Oct 29, 2019 |
| Linux | libitalccore Ubuntu 18.04.6 LTS (bionic) | 1:3.0.3+dfsg1-3ubuntu0.1 | [libitalccore 1:3.0.3+dfsg1-3ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libitalccore-1-3.0.3-dfsg1-3ubuntu0.1.md) | Oct 29, 2019 |
| Linux | libvncclient1 Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.1 | [libvncclient1 0.9.11+dfsg-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncclient1-0.9.11-dfsg-1ubuntu1.1.md) | Jan 29, 2019 |
| Linux | libvncserver-config Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.1 | [libvncserver-config 0.9.11+dfsg-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncserver-config-0.9.11-dfsg-1ubuntu1.1.md) | Jan 29, 2019 |
| Linux | libvncserver1 Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.1 | [libvncserver1 0.9.11+dfsg-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvncserver1-0.9.11-dfsg-1ubuntu1.1.md) | Jan 29, 2019 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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