Vulnerability Details : CVE-2019-20918
An issue was discovered in InspIRCd 3 before 3.1.0. The silence module contains a use after free vulnerability. This vulnerability can be used for remote crashing of an InspIRCd server by any user able to fully connect to a server.
Vulnerability category: Memory Corruption
Products affected by CVE-2019-20918
- cpe:2.3:a:inspircd:inspircd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-20918
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 45 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-20918
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:C |
8.0
|
6.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2019-20918
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-20918
-
https://docs.inspircd.org/security/2019-01/
Security Advisory 2019-01 - InspIRCd DocumentationVendor Advisory
-
https://github.com/inspircd/inspircd/commit/7b47de3c194f239c5fea09a0e49696c9af017d51
Copy the silence flags when sending update notifications. · inspircd/inspircd@7b47de3 · GitHubPatch;Third Party Advisory
-
https://github.com/inspircd/inspircd/commit/bcd65de1ec4bb71591ae417fee649d7ecd37cd57
Add the new implementation of the silence module. · inspircd/inspircd@bcd65de · GitHubPatch;Third Party Advisory
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