Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | awl | 0.61-1 | — |
| Debian 13 | awl | 0.61-1 | — |
| Debian 12 | awl | 0.61-1 | — |
| Debian 10 | awl | 0.60-1+deb10u1 | DSA-4660-1 |
| Debian 9 | awl | 0.57-1+deb9u1 | DSA-4660-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | awl | 0.55-1+deb8u1 | DLA-2178-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | awl | 0.60-1+deb10u1ubuntu1 | USN-4539-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | awl | 0.59-1ubuntu0.1~esm1 | USN-9048-1 |
| Ubuntu Pro 16.04 LTS | awl | 0.56-1ubuntu1+esm1 | USN-9048-1 |
Advisories 4
- USN-9048-1 awl vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-4539-1 awl vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4660-1 awl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2178-1 awl - security update Debian Security (DSA / DLA) · Mar 9, 2026