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

CVE-2018-20749

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

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.

CRITICAL · CVSS 9.8 EPSS 0.10369
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 7% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

9
libvnc project libvncserver< 0.9.12
canonical ubuntu linuxall versions
debian linuxall versions
siemens simatic itc1500 firmware>= 3.0.0.0 and < 3.2.1.0
siemens simatic itc1500 pro firmware>= 3.0.0.0 and < 3.2.1.0
siemens simatic itc1900 firmware>= 3.0.0.0 and < 3.2.1.0
siemens simatic itc1900 pro firmware>= 3.0.0.0 and < 3.2.1.0
siemens simatic itc2200 firmware>= 3.0.0.0 and < 3.2.1.0
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jan 2019 · 06:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

11
suse-csafopenSUSE-SU-2024:10598-1
siemens-csafSSA-390195
usnUSN-4587-1
usnUSN-4547-1
suse-csafSUSE-SU-2019:0313-2
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/106825Broken Link
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/15bb719c03cc70f14c36a843dcb16ed69b405707PatchThird Party Advisory
https://github.com/LibVNC/libvncserver/issues/273Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing ListThird Party Advisory
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