Vulnerability Description
libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libvnc Project | Libvncserver | <= 0.9.12 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 8.0 |
| Siemens | Simatic Itc1500 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1500 | - |
| Siemens | Simatic Itc1500 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1500 Pro | - |
| Siemens | Simatic Itc1900 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1900 | - |
| Siemens | Simatic Itc1900 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc1900 Pro | - |
| Siemens | Simatic Itc2200 Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc2200 | - |
| Siemens | Simatic Itc2200 Pro Firmware | >= 3.0.0.0, < 3.2.1.0 |
| Siemens | Simatic Itc2200 Pro | - |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.htmlMailing ListThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9PatchThird Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-064-libvnc-libvncclientExploitThird Party Advisory
- https://usn.ubuntu.com/4407-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.htmlMailing ListThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9PatchThird Party Advisory
- https://securitylab.github.com/advisories/GHSL-2020-064-libvnc-libvncclientExploitThird Party Advisory
- https://usn.ubuntu.com/4407-1/Third Party Advisory
FAQ
What is CVE-2019-20788?
CVE-2019-20788 is a vulnerability with a CVSS score of 9.8 (CRITICAL). libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
How severe is CVE-2019-20788?
CVE-2019-20788 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2019-20788?
Check the references section above for vendor advisories and patch information. Affected products include: Libvnc Project Libvncserver, Canonical Ubuntu Linux, Debian Debian Linux, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500.