libvncserver: LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Security Fix(e...
CVE-2019-20839 is fixed in 5 products on 1 platform, first by libvncclient1 0.9.11+dfsg-1ubuntu1.3, released June 17, 2020. It is not reported as exploited. Patch Radar priority: High.
LibVNCServer is a C library that enables you to implement VNC server functionality into own programs. Security Fix(es): * libvncserver: uninitialized memory contents are vulnerable to Information Leak (CVE-2018-21247) * libvncserver: buffer overflow in ConnectClientToUnixSock() (CVE-2019-20839) * libvncserver: libvncserver/rfbregion.c has a NULL pointer dereference (CVE-2020-14397) * libvncserver: libvncclient/rfbproto.c does not limit TextChat size (CVE-2020-14405) * libvncserver: libvncserver/rfbserver.c has a divide by zero which could result in DoS (CVE-2020-25708) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libvncclient1 · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.3 | libvncclient1 0.9.11+dfsg-1ubuntu1.3 | Jun 17, 2020 |
| libvncclient1 · Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.2 | libvncclient1 0.9.12+dfsg-9ubuntu0.2 | Jun 17, 2020 |
| libvncserver · RHEL 8 | 0:0.9.11-17.el8 | RHSA-2021:1811 | May 18, 2021 |
| libvncserver · ol 8 | 0:0.9.11-17.el8 | ELSA-2021-1811 | May 25, 2021 |
| libvncserver-config · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.3 | libvncserver-config 0.9.11+dfsg-1ubuntu1.3 | Jun 17, 2020 |
| libvncserver-devel · RHEL 8 | 0:0.9.11-17.el8 | RHSA-2021:1811 | May 18, 2021 |
| libvncserver-devel · ol 8 | 0:0.9.11-17.el8 | ELSA-2021-1811 | May 25, 2021 |
| libvncserver1 · Ubuntu 18.04.6 LTS (bionic) | 0.9.11+dfsg-1ubuntu1.3 | libvncserver1 0.9.11+dfsg-1ubuntu1.3 | Jun 17, 2020 |
| libvncserver1 · Ubuntu 20.04 LTS (focal) | 0.9.12+dfsg-9ubuntu0.2 | libvncserver1 0.9.12+dfsg-9ubuntu0.2 | Jun 17, 2020 |
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