Vulnerability Details : CVE-2018-7226
An issue was discovered in vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through 0.9.10. Missing sanitization of the client-specified message length may cause integer overflow or possibly have unspecified other impact via a specially crafted VNC packet.
Vulnerability category: Overflow
Products affected by CVE-2018-7226
- cpe:2.3:a:vncterm_project:vncterm:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-7226
0.48%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 62 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-7226
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2018-7226
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-7226
-
https://github.com/LibVNC/vncterm/issues/6
Security: VNConsole.c: vcSetXCutTextProc() integer overflow and unchecked malloc() · Issue #6 · LibVNC/vncterm · GitHubPatch;Third Party Advisory
-
https://security.gentoo.org/glsa/201908-05
LibVNCServer: Multiple vulnerabilities (GLSA 201908-05) — Gentoo security
-
http://openwall.com/lists/oss-security/2018/02/18/2
oss-security - Re: LibVNCServer rfbserver.c: rfbProcessClientNormalMessage() case rfbClientCutText doesn't sanitize msg.cct.lengthMailing List
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