Alexander Peslyak

An improper privilege management issue exists in the Linux kernel's ptrace mechanism, specifically within the `get dumpable()` and ` ptrace may access()` functions. The flaw stems from a logic error where the system incorrectly handles the dumpability of tasks that lack an associated memory management (mm) pointer, such as kernel threads. This allows an unprivileged local user to bypass privilege boundaries and access file descriptors of other processes. In certain scenarios, this can be exploited via a race condition during process shutdown to steal privileged file descriptors, leading to local root privilege escalation and the disclosure of sensitive credentials, including SSH private keys and `/etc/shadow` password hashes. Successful exploitation may require the Reliable Datagram Sockets (RDS) module to be loaded, `io ring` to be enabled, and the presence of a readable SUID-root binary on x86 64 systems.

The issue is related to insufficient sanitization of VNC packet input data in the `rfbProcessClientNormalMessage()` function of the LibVNCServer library. This can be exploited by a remote attacker to cause a denial of service and gain unauthorized access to sensitive data. The vulnerability is triggered by specially crafted VNC packets, which can lead to access to uninitialized and potentially sensitive data, or possibly other impacts such as an integer overflow.

The issue is related to the cron package, where the postinst maintainer script allows for group-crontab-to-root privilege escalation via symlink attacks against unsafe usage of the `chown` and `chmod` programs. This can be exploited by an attacker to gain elevated privileges.

A buffer overflow flaw was found in the way minicom handled VT100 escape sequences. A malicious terminal device could potentially use this flaw to crash minicom, or execute arbitrary code in the context of the minicom process.

A use-after-free issue in the xacct add tsk function allows local users to potentially obtain sensitive information from kernel memory or cause a denial of service, resulting in a system crash, by utilizing a taskstats TASKSTATS CMD ATTR PID command.