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Vulnerabilities / CVE-2016-9942

critical

CVE-2016-9942

libvncserver: Heap-based buffer overflow in ultra.c

Published Modified CWE 119
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.5CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium), Ubuntu (medium).

Description

Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.

Affected packages and fixed versions

SourcePackageFixed in
alpine 3.10libvncserver0.9.11-r0
alpine 3.11libvncserver0.9.11-r0
alpine 3.12libvncserver0.9.11-r0
alpine 3.13libvncserver0.9.11-r0
alpine 3.14libvncserver0.9.11-r0
alpine 3.15libvncserver0.9.11-r0
alpine 3.16libvncserver0.9.11-r0
alpine 3.17libvncserver0.9.11-r0
alpine 3.18libvncserver0.9.11-r0
alpine 3.19libvncserver0.9.11-r0
alpine 3.2libvncserver0.9.10-r2
alpine 3.20libvncserver0.9.11-r0
Show all 45 entries from 37 sources
SourcePackageFixed in
alpine 3.10libvncserver0.9.11-r0
alpine 3.11libvncserver0.9.11-r0
alpine 3.12libvncserver0.9.11-r0
alpine 3.13libvncserver0.9.11-r0
alpine 3.14libvncserver0.9.11-r0
alpine 3.15libvncserver0.9.11-r0
alpine 3.16libvncserver0.9.11-r0
alpine 3.17libvncserver0.9.11-r0
alpine 3.18libvncserver0.9.11-r0
alpine 3.19libvncserver0.9.11-r0
alpine 3.2libvncserver0.9.10-r2
alpine 3.20libvncserver0.9.11-r0
alpine 3.21libvncserver0.9.11-r0
alpine 3.22libvncserver0.9.11-r0
alpine 3.23libvncserver0.9.11-r0
alpine 3.24libvncserver0.9.11-r0
alpine 3.3libvncserver0.9.10-r2
alpine 3.4libvncserver0.9.10-r2
alpine 3.5libvncserver0.9.10-r2
alpine 3.6libvncserver0.9.11-r0
alpine 3.7libvncserver0.9.11-r0
alpine 3.8libvncserver0.9.11-r0
alpine 3.9libvncserver0.9.11-r0
alpine edgelibvncserver0.9.11-r0
debian 11libvncserver0.9.11+dfsg-1
debian 11veyon4.1.4+repack1-1
debian 12libvncserver0.9.11+dfsg-1
debian 12veyon4.1.4+repack1-1
debian 13libvncserver0.9.11+dfsg-1
debian 13veyon4.1.4+repack1-1
debian 14libvncserver0.9.11+dfsg-1
debian 7libvncserver0.9.9+dfsg-1+deb7u2
debian 8italc1:2.0.2+dfsg1-2+deb8u1
debian 8libvncserver0.9.9+dfsg2-6.1+deb8u2
echolibvncserver0.9.11+dfsg-1
echoveyon4.1.4+repack1-1
Red Hatlibvncserverno fix listed
Red Hatlibvncserver-develno fix listed
ubuntu 12.04libvncserver0.9.8.2-2ubuntu1.2
ubuntu 14.04libvncserver0.9.9+dfsg-1ubuntu1.2
ubuntu 16.04italc1:2.0.2+dfsg1-4ubuntu0.1
ubuntu 16.04libvncserver0.9.10+dfsg-3ubuntu0.16.04.1
ubuntu 16.04-ESMitalc1:2.0.2+dfsg1-4ubuntu0.1
ubuntu 16.04-ESMlibvncserver0.9.10+dfsg-3ubuntu0.16.04.1
ubuntu 16.10libvncserver0.9.10+dfsg-3ubuntu0.16.10.1

References

All 12 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.