CVE-2017-18922

CWE-787 — Out-of-bounds WriteCWE-122 — Heap-based Buffer Overflow9 documents8 sources
Severity
9.8CRITICAL
EPSS
4.8%
top 10.54%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
10
Libvncserver Project LibvncserverSiemens Simatic Itc1500 FirmwareSiemens Simatic Itc1500 PRO Firmware+7 more
Timeline
PublishedJun 30
Latest updateMay 24

Description

It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages9 packages

▶Debianlibvncserver< 0.9.12+dfsg-3+3
▶NVDsiemens/simatic_itc1500_firmware3.0.0.0 — 3.2.1.0
▶NVDsiemens/simatic_itc1900_firmware3.0.0.0 — 3.2.1.0
▶NVDsiemens/simatic_itc2200_firmware3.0.0.0 — 3.2.1.0

Also affects: Fedora 31, 32, Ubuntu Linux 16.04, 18.04, 19.10, 20.04

Patches

Patch: cert-portal.siemens.com ↗Patch: github.com ↗Patch: usn.ubuntu.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-hq8f-cpqj-qph2: It was discovered that websockets↗2022-05-24
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OSV
CVE-2017-18922: It was discovered that websockets↗2020-06-30
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CVEList
CVE-2017-18922: It was discovered that websockets↗2020-06-30
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📋Vendor Advisories

3
Ubuntu
LibVNCServer vulnerabilities↗2020-07-01
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Red Hat
libvncserver: websocket decoding buffer overflow↗2017-02-15
▶
Debian
CVE-2017-18922: libvncserver - It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not prop...↗2017
▶

💬Community

2
Bugzilla
CVE-2017-18922 libvncserver: websocket decoding buffer overflow↗2020-06-30
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Bugzilla
CVE-2017-18922 libvncserver: websocket decoding buffer overflow [fedora-all]↗2020-06-30
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