CVE-2009-1756: SLiM Simple Login Manager 1.3.0 places the X authority magic cookie (mcookie) on the command line when invo...

Security readout for executives and security teams

SLiM 1.3.0 can expose a secret X session cookie through process arguments. A local user on the same machine may be able to read that secret and gain access to another user’s graphical X session. This is mainly a shared-workstation or multi-user Linux host risk, not a remote internet-facing issue. Exposure is likely limited to Linux systems running SLiM Simple Login Manager 1.3.0, especially systems with multiple local users or shared shell access. The provided CVE record does not identify broader affected versions, CPEs, or downstream package ranges. Treat this as a moderate local privilege-bound exposure. It is not shown as remotely exploitable or actively exploited, but it can undermine desktop session confidentiality on shared systems. Prioritize remediation where multiple users share Linux hosts. Mitigation focus: Check distribution advisories for fixed SLiM packages covering CVE-2009-1756.; Upgrade or replace SLiM if vendor guidance identifies an affected package.; Reduce untrusted local user access on systems still using SLiM 1.3.0..

Prepared

Jun 28, 2026, 10:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.