Security
Headlines
HeadlinesLatestCVEs

Headline

Experts Detail New Zero-Click Windows Vulnerability for NTLM Credential Theft

Cybersecurity researchers have shared details about a now-patched security flaw in Windows MSHTML platform that could be abused to bypass integrity protections on targeted machines. The vulnerability, tracked as CVE-2023-29324 (CVSS score: 6.5), has been described as a security feature bypass. It was addressed by Microsoft as part of its Patch Tuesday updates for May 2023. Akamai security

The Hacker News
#vulnerability#web#mac#windows#microsoft#auth#The Hacker News

Cybersecurity researchers have shared details about a now-patched security flaw in Windows MSHTML platform that could be abused to bypass integrity protections on targeted machines.

The vulnerability, tracked as CVE-2023-29324 (CVSS score: 6.5), has been described as a security feature bypass. It was addressed by Microsoft as part of its Patch Tuesday updates for May 2023.

Akamai security researcher Ben Barnea, who discovered and reported the bug, noted that all Windows versions are affected, but pointed out Microsoft, Exchange

servers with the March update omit the vulnerable feature.

“An unauthenticated attacker on the internet could use the vulnerability to coerce an Outlook client to connect to an attacker-controlled server,” Barnea said in a report shared with The Hacker News.

“This results in NTLM credentials theft. It is a zero-click vulnerability, meaning it can be triggered with no user interaction.”

It’s also worth noting that CVE-2023-29324 is a bypass for a fix Microsoft put in place in March 2023 to resolve CVE-2023-23397, a critical privilege escalation flaw in Outlook that the company said has been exploited by Russian threat actors in attacks aimed at European entities since April 2022.

UPCOMING WEBINAR

Learn to Stop Ransomware with Real-Time Protection

Join our webinar and learn how to stop ransomware attacks in their tracks with real-time MFA and service account protection.

Save My Seat!

Akamai said the issue stems from complex handling of paths in Windows, thereby allowing a threat actor to craft a malicious URL that can sidestep internet security zone checks.

“This vulnerability is yet another example of patch scrutinizing leading to new vulnerabilities and bypasses,” Barnea said. “It is a zero-click media parsing attack surface that could potentially contain critical memory corruption vulnerabilities.”

In order to stay fully protected, Microsoft is further recommending users to install Internet Explorer Cumulative updates to address vulnerabilities in the MSHTML platform and scripting engine.

Found this article interesting? Follow us on Twitter and LinkedIn to read more exclusive content we post.

Related news

Russia's Fancy Bear Pummels Windows Print Spooler Bug

The infamous Russian threat actor has created a custom tool called GooseEgg to exploit CVE-2022-38028 in cyber-espionage attacks against targets in Ukraine, Western Europe, and North America.

Fat Patch Tuesday, February 2024 Edition

Microsoft Corp. today pushed software updates to plug more than 70 security holes in its Windows operating systems and related products, including two zero-day vulnerabilities that are already being exploited in active attacks.

Beware: Experts Reveal New Details on Zero-Click Outlook RCE Exploits

Technical details have emerged about two now-patched security flaws in Microsoft Windows that could be chained by threat actors to achieve remote code execution on the Outlook email service sans any user interaction. "An attacker on the internet can chain the vulnerabilities together to create a full, zero-click remote code execution (RCE) exploit against Outlook clients," Akamai security

Russian APT28 Hackers Targeting 13 Nations in Ongoing Cyber Espionage Campaign

The Russian nation-state threat actor known as APT28 has been observed making use of lures related to the ongoing Israel-Hamas war to facilitate the delivery of a custom backdoor called HeadLace. IBM X-Force is tracking the adversary under the name ITG05, which is also known as BlueDelta, Fancy Bear, Forest Blizzard (formerly Strontium), FROZENLAKE, Iron Twilight, Sednit, Sofacy, and

Microsoft Warns of Kremlin-Backed APT28 Exploiting Critical Outlook Vulnerability

Microsoft on Monday said it detected Kremlin-backed nation-state activity exploiting a critical security flaw in its Outlook email service to gain unauthorized access to victims' accounts within Exchange servers. The tech giant attributed the intrusions to a threat actor it called Forest Blizzard (formerly Strontium), which is also widely tracked under the monikers APT28,

Critical Zero-Days in Atera Windows Installers Expose Users to Privilege Escalation Attacks

Zero-day vulnerabilities in Windows Installers for the Atera remote monitoring and management software could act as a springboard to launch privilege escalation attacks. The flaws, discovered by Mandiant on February 28, 2023, have been assigned the identifiers CVE-2023-26077 and CVE-2023-26078, with the issues remediated in versions 1.8.3.7 and 1.8.4.9 released by Atera on April 17, 2023, and

Microsoft Warns of Widescale Credential Stealing Attacks by Russian Hackers

Microsoft has disclosed that it's detected a spike in credential-stealing attacks conducted by the Russian state-affiliated hacker group known as Midnight Blizzard. The intrusions, which made use of residential proxy services to obfuscate the source IP address of the attacks, target governments, IT service providers, NGOs, defense, and critical manufacturing sectors, the tech giant's threat

CVE-2023-29324

Windows MSHTML Platform Security Feature Bypass Vulnerability

Microsoft Patch Tuesday for May 2023 — Fewest vulnerabilities disclosed in a month in three-plus years

One of the vulnerabilities is being actively exploited in the wild, according to Microsoft, the fourth month in a row in which this is the case.

CVE-2023-29324: Windows MSHTML Platform Security Feature Bypass Vulnerability

**According to the CVSS metric, successful exploitation of this vulnerability could lead to some loss of integrity (I:L) and some loss of availability (A:L). What does that mean for this vulnerability?** An attacker can craft a malicious URL that would evade zone checks, resulting in a limited loss of integrity and availability of the victim machine.

Microsoft Warns of Stealthy Outlook Vulnerability Exploited by Russian Hackers

Microsoft on Friday shared guidance to help customers discover indicators of compromise (IoCs) associated with a recently patched Outlook vulnerability. Tracked as CVE-2023-23397 (CVSS score: 9.8), the critical flaw relates to a case of privilege escalation that could be exploited to steal NT Lan Manager (NTLM) hashes and stage a relay attack without requiring any user interaction. "External

From Ransomware to Cyber Espionage: 55 Zero-Day Vulnerabilities Weaponized in 2022

As many as 55 zero-day vulnerabilities were exploited in the wild in 2022, with most of the flaws discovered in software from Microsoft, Google, and Apple. While this figure represents a decrease from the year before, when a staggering 81 zero-days were weaponized, it still represents a significant uptick in recent years of threat actors leveraging unknown security flaws to their advantage. The

Microsoft Outlook Vulnerability Could Be 2023's 'It' Bug

Snowballing PoC exploits for CVE-2023-23397 and a massive attack surface means almost business user could be a victim.

Threat Source newsletter (March 16, 2023) — A deep dive into Talos' work in Ukraine

The latest episode of ThreatWise TV from Hazel Burton is the closest look yet at the team Talos assembled in the days after Russia invaded Ukraine.

Threat Advisory: Microsoft Outlook privilege escalation vulnerability being exploited in the wild

Cisco Talos is urging all users to update Microsoft Outlook after the discovery of a critical vulnerability, CVE-2023-23397, in the email client that attackers are actively exploiting in the wild.

Microsoft Patch Tuesday, March 2023 Edition

Microsoft on Tuesday released updates to quash at least 74 security bugs in its Windows operating systems and software. Two of those flaws are already being actively attacked, including an especially severe weakness in Microsoft Outlook that can be exploited without any user interaction.

Update now! Microsoft fixes two zero-day bugs

Categories: Exploits and vulnerabilities Categories: News Tags: patch Tuesday Tags: March Tags: 2023 Tags: Microsoft Tags: Adobe Tags: Fortinet Tags: Android Tags: SAP Tags: CVE-2023-23397 Tags: CVE-2023-24880 Tags: CVE-2023-26360 Tags: CVE-2022-41328 This Patch Tuesday, Microsoft has released fixes for two actively exploited zero-days and Adobe has fixed one. (Read more...) The post Update now! Microsoft fixes two zero-day bugs appeared first on Malwarebytes Labs.

CVE-2023-23397

Microsoft Outlook Elevation of Privilege Vulnerability

Microsoft Mitigates Outlook Elevation of Privilege Vulnerability

May 9, 2023 update: Releases for Microsoft Products has been updated with the release of CVE-2023-29324 - Security Update Guide - Microsoft - Windows MSHTML Platform Security Feature Bypass Vulnerability March 24, 2023 update: Impact Assessment has been updated to a link to Guidance for investigating attacks using CVE-2023-23397 - Microsoft Security Blog.

CVE-2023-23397: Microsoft Outlook Elevation of Privilege Vulnerability

**According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H), integrity (I:H) and availability (A:H). What does that mean for this vulnerability?** An attacker who successfully exploited this vulnerability could access a user's Net-NTLMv2 hash which could be used as a basis of an NTLM Relay attack against another service to authenticate as the user.

The Hacker News: Latest News

Warning: Over 2,000 Palo Alto Networks Devices Hacked in Ongoing Attack Campaign