Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libvnc Project | Libvncserver | < 0.9.12 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 14.04 |
| 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
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266PatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb88PatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/c5ba3fee85a7ecbbca1df5ffd46d32b927PatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/e34bcbb759ca5bef85809967a268fdf214PatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/issues/273Issue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00029.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing ListThird 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/2018/12/10/8ExploitMailing ListThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfPatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/a64c3b37af9a6c8f8009d7516874b8d266PatchThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/c2c4b81e6cb3b485fb1ec7ba9e7defeb88PatchThird Party Advisory
FAQ
What is CVE-2018-20748?
CVE-2018-20748 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.
How severe is CVE-2018-20748?
CVE-2018-20748 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-2018-20748?
Check the references section above for vendor advisories and patch information. Affected products include: Libvnc Project Libvncserver, Debian Debian Linux, Canonical Ubuntu Linux, Siemens Simatic Itc1500 Firmware, Siemens Simatic Itc1500.