Alexander Peslyak

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 7.0.8 Linux kernel versions prior to 6.18.31 Linux kernel versions prior to 6.12.89 Linux kernel versions prior to 6.6.139 Linux kernel versions prior to 6.1.173 Linux kernel versions prior to 5.15.207 Linux kernel versions prior to 5.10.256 **Description** 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. **Recommendations** Update the Linux kernel to version 7.0.8 or newer. Update the Linux kernel to version 6.18.31 or newer. Update the Linux kernel to version 6.12.89 or newer. Update the Linux kernel to version 6.6.139 or newer. Update the Linux kernel to version 6.1.173 or newer. Update the Linux kernel to version 5.15.207 or newer. Update the Linux kernel to version 5.10.256 or newer.

**Name of the Vulnerable Software and Affected Versions** LibVNCServer versions prior to 0.9.12 **Description** 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. **Recommendations** For LibVNCServer versions prior to 0.9.12, update to version 0.9.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the `rfbProcessClientNormalMessage()` function to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** cron versions 3.0pl1-128 through 3.0pl1-128ubuntu2 **Description** 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. **Recommendations** For cron versions 3.0pl1-128 through 3.0pl1-128ubuntu2, consider disabling the postinst maintainer script as a temporary workaround to minimize the risk of exploitation. Restrict access to the `chown` and `chmod` programs to prevent unsafe usage. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** minicom versions prior to 2.7.1 **Description** 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. **Recommendations** For minicom versions prior to 2.7.1, update to version 2.7.1 or later to resolve the issue. As a temporary workaround, consider restricting access to minicom to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 2.6.19 **Description** 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. **Recommendations** For versions prior to 2.6.19, update to version 2.6.19 or later to resolve the issue.