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Published: 15 April 2020

An issue was discovered in DAViCal Andrew's Web Libraries (AWL) through 0.60. Session management does not use a sufficiently hard-to-guess session key. Anyone who can guess the microsecond time (and the incrementing session_id) can impersonate a session.



Cvss 3 Severity Score


Score breakdown


Package Release Status
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(end of life)
trusty Does not exist

Released (0.61-1)
impish Not vulnerable
Released (0.60-1+deb10u1ubuntu1)
groovy Not vulnerable
hirsute Not vulnerable
xenial Needs triage

jammy Not vulnerable
kinetic Not vulnerable
lunar Not vulnerable
mantic Not vulnerable

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N