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CVE-2018-20750
CRITICAL
LibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.
Published: Jan 30, 2019
Modified: Jun 17, 2026
CWE-787
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (14)
| Vendor | Product | Version |
|---|---|---|
| libvnc_project | libvncserver | * < 0.9.12 |
| canonical | ubuntu_linux | 14.04 |
| canonical | ubuntu_linux | 16.04 |
| canonical | ubuntu_linux | 16.04 |
| canonical | ubuntu_linux | 18.04 |
| canonical | ubuntu_linux | 18.10 |
| debian | debian_linux | 8.0 |
| debian | debian_linux | 9.0 |
| siemens | simatic_itc1500_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
| siemens | simatic_itc1500_pro_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
| siemens | simatic_itc1900_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
| siemens | simatic_itc1900_pro_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
| siemens | simatic_itc2200_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
| siemens | simatic_itc2200_pro_firmware | * ≥ 3.0.0.0 < 3.2.1.0 |
GitHub Security Advisory GHSA-g4v8-w4cc-whrg
LibVNC through 0.9.12 contains a heap out-of-bounds write vulnerability in libvncserver/rfbserver...
References (20)
- http://www.securityfocus.com/bid/106825 Broken Link
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf Patch, Third Party Advisory
- https://github.com/LibVNC/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238bd9ffec Patch, Third Party Advisory
- https://github.com/LibVNC/libvncserver/issues/273 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html Mailing List, Third Party Advisory
- https://usn.ubuntu.com/3877-1/ Third Party Advisory
- https://usn.ubuntu.com/4547-1/ Third Party Advisory
- https://usn.ubuntu.com/4587-1/ Third Party Advisory
- https://www.openwall.com/lists/oss-security/2018/12/10/8 Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106825 Broken Link
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf Patch, Third Party Advisory
- https://github.com/LibVNC/libvncserver/commit/09e8fc02f59f16e2583b34fe1a270c238bd9ffec Patch, Third Party Advisory
- https://github.com/LibVNC/libvncserver/issues/273 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.html Mailing List, Third Party Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
3.34%
Top 12% most likely to be exploited
Threat Score
40.2 / 100
Data Sources
NVD
EPSS
GitHub