UBUNTU-CVE-2025-40923

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Source
https://ubuntu.com/security/CVE-2025-40923
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40923.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-40923
Upstream
Published
2025-07-16T13:15:00Z
Modified
2025-07-24T05:06:51Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely. The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.30-1?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.30-1

Ubuntu:Pro:18.04:LTS / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.30-2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.30-1
0.30-2

Ubuntu:Pro:20.04:LTS / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.33-1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.32-1
0.33-1

Ubuntu:22.04:LTS / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.33-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.33-1

Ubuntu:24.04:LTS / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.33-2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.33-2

Ubuntu:25.04 / libplack-middleware-session-perl

Package

Name
libplack-middleware-session-perl
Purl
pkg:deb/ubuntu/libplack-middleware-session-perl@0.34-1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.33-2
0.34-1