#microsoft

Ubuntu Security Notice 5791-2 - It was discovered that a race condition existed in the Android Binder IPC subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. David Leadbeater discovered that the netfilter IRC protocol tracking implementation in the Linux Kernel incorrectly handled certain message payloads in some situations. A remote attacker could possibly use this to cause a denial of service or bypass firewall filtering.

A high-severity security flaw has been disclosed in the open source jsonwebtoken (JWT) library that, if successfully exploited, could lead to remote code execution on a target server. "By exploiting this vulnerability, attackers could achieve remote code execution (RCE) on a server verifying a maliciously crafted JSON web token (JWT) request," Palo Alto Networks Unit 42 researcher Artur Oleyarsh

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?** An authenticated attacker could exploit this vulnerability LAN-side or potentially from the internet.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**What type of information could be disclosed by this vulnerability?** Exploiting this vulnerability could allow the disclosure of NTLM hashes.

**What type of information could be disclosed by this vulnerability?** The type of information that could be disclosed if an attacker successfully exploited this vulnerability is sensitive information.

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** The attacker must be authenticated and possess the permissions for page creation to be able to exploit this vulnerability.

**Are any additional steps required to protect my SharePoint farm after installing the January 10, 2023 security update for SharePoint Server?** Yes. Customers must also trigger a SharePoint upgrade action included in this update to protect their SharePoint farm. The upgrade action can be triggered by running the SharePoint Products Configuration Wizard, the Upgrade-SPFarm PowerShell cmdlet, or the "psconfig.exe -cmd upgrade -inplace b2b" command on each SharePoint server after installing the update.