It was discovered that libXdmcp used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.
Find out more about CVE-2017-2625 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity Impact | None |
| Availability Impact | None |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (libXdmcp) | RHSA-2017:1865 | 2017-08-01 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | libXdmcp | Will not fix |
| Red Hat Enterprise Linux 5 | libXdmcp | Will not fix |
Vulmon