CVE-2016-9942
CRITICAL9.8EPSS 1.7%Published: 12/31/2016Modified: 4/28/2026
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 (3)
- Alpine/libvncserverfrom 0, < 0.9.11-r0
- Debian/libvncserverfrom 0, < 0.9.11+dfsg-1
- Debian/veyonfrom 0, < 4.1.4+repack1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |