An integer underflow has been discovered in strongSwan VPN's charon server, which could lead to a buffer overflow and consequent crash. A local attacker, with enough privileges to access the Unix Domain Socket /var/run/charon.ctl, could use this vulnerability to crash the charon server.
Find out more about CVE-2018-5388 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | strongimcv | Affected |
On Red Hat Enterprise Linux 7 only root has access to /var/run/charon.ctl so you need to be already root to exploit the vulnerability.
Vulmon