Security News > 2023 > September > Exploit released for Microsoft SharePoint Server auth bypass flaw
Proof-of-concept exploit code has surfaced on GitHub for a critical authentication bypass vulnerability in Microsoft SharePoint Server, allowing privilege escalation.
Janggggg successfully achieved RCE on a Microsoft SharePoint Server using this exploit chain during the March 2023 Pwn2Own contest in Vancouver, earning a $100,000 reward.
"The script outputs details of admin users with elevated privileges and can operate in both single and mass exploit modes," the exploit's developer says.
A YARA rule is also available to help network defenders analyze logs for signs of potential exploitation on their SharePoint servers using the CVE-2023-29357 PoC exploit.
Despite the existing exploit not granting immediate remote code execution capabilities, it is highly recommended to apply the security patches issued by Microsoft earlier this year as a preventive measure against potential attacks.
Exploit released for Ivanti Sentry bug abused as zero-day in attacks.
News URL
Related news
- Microsoft SharePoint RCE flaw exploits in the wild – you've had 3 months to patch (source)
- Microsoft fixes Windows Server performance issues from August updates (source)
- Microsoft ends development of Windows Server Update Services (WSUS) (source)
- Microsoft fixes Remote Desktop issues caused by Windows Server update (source)
- New Mamba 2FA bypass service targets Microsoft 365 accounts (source)
- Exploit code for critical GitLab auth bypass flaw released (CVE-2024-45409) (source)
- Microsoft deprecates PPTP and L2TP VPN protocols in Windows Server (source)
- Exploit released for new Windows Server "WinReg" NTLM Relay attack (source)
- CISA Warns of Active Exploitation of Microsoft SharePoint Vulnerability (CVE-2024-38094) (source)
Related Vulnerability
DATE | CVE | VULNERABILITY TITLE | RISK |
---|---|---|---|
2023-06-14 | CVE-2023-29357 | Unspecified vulnerability in Microsoft Sharepoint Server 2019 Microsoft SharePoint Server Elevation of Privilege Vulnerability | 9.8 |