Home/CVE/LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for
CVE

CVE-2018-20748

LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for

LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.

CRITICAL · CVSS 9.8 EPSS 0.10572
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
debian linuxall versions
canonical ubuntu 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

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266b42baePatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb889f6ba7PatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b92757bc2aPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/commit/e34bcbb759ca5bef85809967a268fdf214c1ad2cPatchThird Party Advisory
https://github.com/LibVNC/libvncserver/issues/273Issue TrackingThird Party Advisory
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