Vulnerability Details : CVE-2019-15680
TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
Vulnerability category: Memory CorruptionDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2019-15680
Probability of exploitation activity in the next 30 days: 0.43%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 74 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-15680
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2019-15680
-
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.Assigned by:
- nvd@nist.gov (Primary)
- vulnerability@kaspersky.com (Secondary)
References for CVE-2019-15680
-
https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
[SECURITY] [DLA 2045-1] tightvnc security update
- https://cert-portal.siemens.com/productcert/pdf/ssa-478893.pdf
-
https://www.openwall.com/lists/oss-security/2018/12/10/5
oss-security - libvnc and tightvnc vulnerabilitiesMailing List;Third Party Advisory
-
https://usn.ubuntu.com/4407-1/
USN-4407-1: LibVNCServer vulnerabilities | Ubuntu security notices | Ubuntu
- https://us-cert.cisa.gov/ics/advisories/icsa-20-343-08
Products affected by CVE-2019-15680
- cpe:2.3:a:tightvnc:tightvnc:1.3.10:*:*:*:*:*:*:*