# CVE-2018-20749: italc-client: LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c

CVE-2018-20749 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-2018-20749
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0323
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 29, 2019

## Description

LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

## 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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