{"uuid": "e02dff42-cdc3-46ce-860a-ff25e338f9e3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-29324", "type": "seen", "source": "https://t.me/hacking_Attack/102013", "content": "Black Hat Ethical Hacking\nMicrosoft\u2019s Urgent Fix: Bypassing Recent Patches for Critical Outlook Zero-Day Exploited in the Wild\n\nMicrosoft\u2019s Urgent Fix: Bypassing Recent Patches for Critical Outlook Zero-Day Exploited in the WildPost Views: 2,248 Premium Contenthttps://www.blackhatethicalhacking.com/wp-content/uploads/2022/12/Patreon.png Subscribe to Patreon to watch this episode.\nReading Time: 3 Minutes Microsoft Addresses Critical Outlook Zero-Day Bypass Vulnerability Microsoft swiftly responded to a security vulnerability this week, addressing a flaw that allowed remote attackers to bypass recent patches targeting a critical zero-day security issue in Outlook. This zero-click bypass, known as CVE-2023-29324, impacts all supported versions of Windows and was brought to light by Akamai security researcher Ben Barnea.\n\nBarnea explained, \u201cAll Windows versions are affected by the vulnerability. As a result, all Outlook client versions on Windows are exploitable.\u201d\n\nThe previously patched Outlook zero-day bug, identified as CVE-2023-23397, is a privilege escalation flaw in the Outlook client for Windows. This flaw enables attackers to illicitly obtain NTLM hashes without user interaction in NTLM-relay attacks. Exploiting the bug involves sending messages with extended MAPI properties containing UNC paths to customized notification sounds, leading the Outlook client to connect to SMB shares under the attackers\u2019 control.\n\nMicrosoft tackled the issue by implementing a MapUrlToZone call to ensure that UNC paths do not link to internet URLs. Additionally, they replaced the sounds with default reminders if such links were detected.\nSee Also: So you want to be a hacker? Offensive Security, Bug Bounty Courses Microsoft Warns of Critical Outlook Zero-Day Bypass Vulnerability Exploited by APT28 HackersDuring the analysis of the CVE-2023-23397 mitigation, Barnea discovered a way to change the URL in reminder messages, tricking the MapUrlToZone checks into accepting remote paths as local paths. This bypasses Microsoft\u2019s patch, resulting in the Windows Outlook client connecting to the attacker\u2019s server.\n\nBarnea shed light on the matter, stating, \u201cThis issue seems to be a result of the complex handling of paths in Windows.\u201d\n\nIn response to Barnea\u2019s findings, Microsoft issued a warning, emphasizing the importance of installing updates for both CVE-2023-23397 and CVE-2023-29324 to ensure comprehensive protection.\nRemember that 0-click Outlook vulnerability with a custom sound leading to NTLM theft?\n\nAkamai researchers found a way to bypass the patch to it. \n\nIn our write-up, see how adding a slash allowed for a bypass.https://t.co/eO121SaZur pic.twitter.com/YrrBikMZqj\n\n\u2014 Akamai Security Intelligence Group (@akamai_research) May 10, 2023\nWhile Internet Explorer has been retired, the vulnerable MSHTML platform is still utilized by certain applications through the WebBrowser control, as well as by the Internet Explorer mode in Microsoft Edge. Consequently, Microsoft urges customers to install the latest security updates and the IE Cumulative updates, specifically addressing the CVE-2023-29324 vulnerability, to remain fully protected.\n\nThe severity of this vulnerability became evident as Microsoft unveiled details from a private threat analytics report, revealing that it had been exploited by Russian APT28 state hackers, also known as STRONTIUM, Sednit, Sofacy, or Fancy Bear. These hackers targeted at least 14 government, military, energy, and transportation organizations between mid-April and December 2022.\nTrending: How to Exploit \u201cimproper error handling\u201d in Web Applications Trending: Malware Analysis Tool: retoolkit\nAPT28 is closely asso[...]", "creation_timestamp": "2026-09-02T01:01:18.370868Z"}