Vulnerability Details : CVE-2018-6917
In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, insufficient validation of user-provided font parameters can result in an integer overflow, leading to the use of arbitrary kernel memory as glyph data. Unprivileged users may be able to access privileged kernel data.
Vulnerability category: Overflow
Products affected by CVE-2018-6917
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-6917
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-6917
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-6917
-
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-2018-6917
-
http://www.securityfocus.com/bid/103668
FreeBSD CVE-2018-6917 Multiple Integer Overflow VulnerabilitiesThird Party Advisory;VDB Entry
-
http://www.securitytracker.com/id/1040629
FreeBSD vt(4) Driver Integer Overflow Lets Local Users View Portions of System Memory on the Target System - SecurityTrackerThird Party Advisory;VDB Entry
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https://security.FreeBSD.org/advisories/FreeBSD-SA-18:04.vt.asc
Vendor Advisory
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