CVE-2019-15681
HIGHCVSS 7.5/10EPSS 3.35%
Last modified
CVE-2019-15681 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. EPSS estimates a 3.35% chance of exploitation in the next 30 days.
Description
LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libvnc Project | Libvncserver | < 0.9.12 |
| Canonical | Ubuntu Linux | 14.04 |
| 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 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00073.htmlMailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82aPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00039.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4407-1/Third Party Advisory
- https://usn.ubuntu.com/4547-1/Third Party Advisory
- https://usn.ubuntu.com/4573-1/Third Party Advisory
- https://usn.ubuntu.com/4587-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00027.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00073.htmlMailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfThird Party Advisory
- https://github.com/LibVNC/libvncserver/commit/d01e1bb4246323ba6fcee3b82ef1faa9b1dac82aPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00039.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4407-1/Third Party Advisory
- https://usn.ubuntu.com/4547-1/Third Party Advisory
- https://usn.ubuntu.com/4573-1/Third Party Advisory
- https://usn.ubuntu.com/4587-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-15681?
LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
How severe is CVE-2019-15681?
CVE-2019-15681 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.35% probability of exploitation in the next 30 days.
How do I fix CVE-2019-15681?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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