DEBIAN-CVE-2026-13577
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-13577
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-13577.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-13577
- Upstream
- Published
- 2026-07-20T08:16:28Z
- Modified
- 2026-09-21T08:47:31Z
- Severity
-
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Dancer2 versions before 2.2.0 for Perl generate insecure session ids when required CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id unless both Math::Random::ISAAC::XS and Crypt::URandom are available. The fallback session id is generated from a SHA-1 hash of a call to the built-in rand function, the absolute path of the Dancer2::Core::Role::SessionFactory module, an internal counter, the process id, the module instance memory address, and a shuffled string of characters (using the List::Util::shuffle function, which also uses the built-in rand function). These are all low-entropy and easily guessed sources. The built-in rand() function is seeded with 32-bits and considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.
- References
Affected packages
Debian:12 / libdancer2-perl
Package
- Name
- libdancer2-perl
- Purl
- pkg:deb/debian/libdancer2-perl?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / libdancer2-perl
Package
- Name
- libdancer2-perl
- Purl
- pkg:deb/debian/libdancer2-perl?arch=source&distro=trixie
Debian:14 / libdancer2-perl
Package
- Name
- libdancer2-perl
- Purl
- pkg:deb/debian/libdancer2-perl?arch=source&distro=forky