CVE-2018-20749

CWE-787 — Out-of-bounds WriteCWE-122 — Heap-based Buffer Overflow13 documents8 sources
Severity
9.8CRITICAL
EPSS
10.4%
top 6.80%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
Libvnc Project LibvncserverSiemens Simatic Itc1500 FirmwareSiemens Simatic Itc1500 PRO Firmware+6 more
Timeline
PublishedJan 30
Latest updateMay 13

Description

LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.

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 Packages8 packages

▶Debianlibvncserver< 0.9.11+dfsg-1.3+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: Debian Linux 8.0, 9.0, Ubuntu Linux 14.04, 16.04, 18.04, 18.10

Patches

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

🔴Vulnerability Details

4
GHSA
GHSA-r6jv-7mgh-x66r: LibVNC before 0↗2022-05-13
▶
OSV
italc vulnerabilities↗2020-09-28
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OSV
CVE-2018-20749: LibVNC before 0↗2019-01-30
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CVEList
CVE-2018-20749: LibVNC before 0↗2019-01-30
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📋Vendor Advisories

5
Ubuntu
iTALC vulnerabilities↗2020-10-20
▶
Ubuntu
iTALC vulnerabilities↗2020-09-28
▶
Ubuntu
LibVNCServer vulnerabilities↗2019-01-31
▶
Red Hat
libvncserver: Heap out-of-bounds write in rfbserver.c in rfbProcessFileTransferReadBuffer() allows for potential code execution (Incomplete fix for CVE-2018-15127)↗2019-01-06
▶
Debian
CVE-2018-20749: libvncserver - LibVNC before 0.9.12 contains a heap out-of-bounds write vulnerability in libvnc...↗2018
▶

💬Community

3
Bugzilla
CVE-2018-20749 libvncserver: Heap out-of-bounds write in rfbserver.c in rfbProcessFileTransferReadBuffer() allows for potential code execution (Incomplete fix for CVE-2018-15127)↗2019-01-31
▶
Bugzilla
CVE-2018-20019 CVE-2018-20748 CVE-2018-20749 CVE-2018-20750 libvncserver: various flaws [fedora-all]↗2018-12-20
▶
Bugzilla
CVE-2018-20019 CVE-2018-20748 CVE-2018-20749 CVE-2018-20750 libvncserver: various flaws [epel-7]↗2018-12-20
▶