vulnerability
FreeBSD: VID-1b6a10e9-4b7b-11e9-9e89-54e1ad3d6335 (CVE-2017-2625): libXdmcp -- insufficient entropy generating session keys
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:P/I:N/A:N) | Mar 21, 2019 | Apr 1, 2019 | Dec 10, 2025 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
Mar 21, 2019
Added
Apr 1, 2019
Modified
Dec 10, 2025
Description
The freedesktop and x.org project reports: It was discovered that libXdmcp before 1.1.3 used weak entropy to generate session keys on platforms without arc4random_buf() but with getentropy(). 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. Please note, that since FreeBSD provides arc4random_buf(), it is unknown if FreeBSD is affected by this vulnerability
Solution
freebsd-upgrade-package-libxdmcp
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