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Related Vulnerabilities: CVE-2016-9942

A heap-based buffer overflow has been discovered 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.

Source

Severity Critical

Remote Yes

Type Arbitrary code execution

Description

A heap-based buffer overflow has been discovered 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.

AVG-124 libvncserver 0.9.10-4 0.9.11-1 Critical Fixed FS#52481

13 Jan 2017 ASA-201701-20 AVG-124 libvncserver Critical arbitrary code execution

https://github.com/LibVNC/libvncserver/pull/137

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