Headline
Actively Exploited Zero-Day Bug Patched by Microsoft
Microsoft’s May Patch Tuesday roundup also included critical fixes for a number of flaws found in infrastructure present in many enterprise and cloud environments.
Microsoft’s May Patch Tuesday roundup also included critical fixes for a number of flaws found in infrastructure present in many enterprise and cloud environments.
Microsoft has revealed 73 new patches for May’s monthly update of security fixes, including a patch for one flaw–a zero-day Windows LSA Spoofing Vulnerability rated as “important”—that is currently being exploited with man-in-the-middle attacks.
The software giant’s monthly update of patches that comes out every second Tuesday of the month–known as Patch Tuesday—also included fixes for seven “critical” flaws, 65 others rated as “important,” and one rated as “low.”
Given that Microsoft released a record number of patches in April, May’s patch tally is relatively low, but still includes a number of notable flaws that deserve attention, researchers said.
“Although this isn’t a large number, this month makes up for it in severity and infrastructure headaches,” observed Chris Hass, director of security at security firm Automox, in an email to Threatpost. “The big news is the critical vulnerabilities that need to be highlighted for immediate action.”
Of the seven critical flaws, five allow for remote code execution (RCE) and two give attackers elevation of privilege (EoP). The remainder of the flaws also include a high percentage of RCE and EoP bugs, with the former accounting for 32.9 percent of the flaws patched this month, while the latter accounted for 28.8 percent of fixes, according to a blog post by researchers at Tenable.
The Windows LSA Spoofing Vulnerability, tracked as CVE-2022-26925, in and of itself was not rated as critical. However, when chained with a new technology LAN manager (NTLM) relay attack, the combined CVSSv3 score for the attack chain is 9.8, noted Allan Liska, a senior security architect at Recorded Future, in an e-mail to Threatpost.
Moreover, the flaw—which allows an unauthenticated attacker to coerce domain controllers to authenticate to an attacker-controller server using NTLM–is being exploited in the wild as a zero-day, he said. This makes it a priority to patch, Liska added, echoing guidance from Microsoft.
****Critical Infrastructure Vulnerabilities****
Of the other critical RCE flaws patched by Microsoft, four are worth noting because of their presence in infrastructure that’s fairly ubiquitous in many enterprise and/or cloud environments.
One is tracked as CVE-2022-29972 and is found in Insight Software’s Magnitude Simba Amazon Redshift ODBC Driver, and would need to be patched by a cloud provider—something organizations should follow up on, Liska said.
CVE-2022-22012 and CVE-2022-29130 are RCE vulnerabilities found in Microsoft’s LDAP service that are rated as critical. However, a caveat by Microsoft in its security bulletin noted that they are only exploitable “if the MaxReceiveBuffer LDAP policy is set to a value higher than the default value.” That means that systems with the default value of this policy would not be vulnerable, the company said.
While “having the MaxReceiveBuffer set to a higher value than the default” seems an “uncommon configuration,” if an organization has this setting, it should prioritize patching these vulnerabilities, Liska observed.
Another critical RCE, CVE-2022-26937, is found in the Network File System (NFS) and has broad impact for Windows Server versions 2008 through 2022. However, this vulnerability only affects NFSV2 and NFSV3, and Microsoft has included instructions for disabling these versions of the NFS in the bulletin.
At the same time, Microsoft characterized the ease of exploitation of these vulnerabilities as “Exploitation More Likely,” as was the case with a similar vulnerability, CVE-2021-26432, an actively exploited zero day in the TCP/IP protocol stack in Windows server that was patched in August 2021.
“Given the similarities between these vulnerabilities and those of August of 2021, we could all be in store for a rough May,” Liska noted.
****Another Important Flaw Fixed****
Of the other flaws, another “important” one to note is CVE-2022-22019, a companion vulnerability to three previously disclosed and patched flaws found in Microsoft’s Remote Procedure Call (RPC) runtime library.
The vulnerability, discovered by Akamai researcher Ben Barnea, takes advantage of three RPC runtime library flaws that Microsoft had patched in April–CVE-2022-26809, CVE-2022-24492 and CVE-2022-24528, he revealed in a blog post Tuesday. The flaws affected Windows 7, 8, 10 and 11, and Windows Servers 2008, 2012, 2019 and 2022, and could allow a remote, unauthenticated attacker to execute code on the vulnerable machine with the privileges of the RPC service.
Akamai researchers discovered that the previous patch only partially addressed the problem, allowing the new vulnerability to create the same integer overflow that was supposed to be fixed, he explained.
“During our research, we found that right before allocating memory for the new coalesced buffer, the code adds another 24 bytes to the allocation size,” Barnea wrote in the post. “These 24 bytes are the size of a struct called ‘rpcconn_request_hdr_t,’ which serves as the buffer header.”
The previous patch performs the check for integer overflow before adding the header size, so it does not take into account this header–which can lead to the same integer overflow that the patch was attempting to mitigate, he explained.
“The new patch adds another call to validate that the addition of 24 bytes does not overflow,” mitigating the problem, Barnea wrote.
Related news
Hello everyone! This will be an episode about the Microsoft vulnerabilities that were released on June Patch Tuesday and also between May and June Patch Tuesdays. Alternative video link (for Russia): https://vk.com/video-149273431_456239094 On June Patch Tuesday, June 14, 56 vulnerabilities were released. Between May and June Patch Tuesdays, 38 vulnerabilities were released. This gives us 94 […]
Patch Tuesday for June 2022 brought a fix for Follina and many other security vulnerabilities. Time to figure out what needs to be prioritized. The post Update now! Microsoft patches Follina, and many other security updates appeared first on Malwarebytes Labs.
Here are which Microsoft patches to prioritize among the June Patch Tuesday batch.
Microsoft has incorporated additional improvements to address the recently disclosed SynLapse security vulnerability in order to meet comprehensive tenant isolation requirements in Azure Data Factory and Azure Synapse Pipelines. The latest safeguards include moving the shared integration runtimes to sandboxed ephemeral instances and using scoped tokens to prevent adversaries from using a client
Hello everyone! This episode will be about Microsoft Patch Tuesday for May 2022. Sorry for the delay, this month has been quite intense. As usual, I’m using my Vulristics project and going through not only the vulnerabilities that were presented on May 10th, but all the MS vulnerabilities presented by Microsoft since the previous Patch […]
By Waqas The latest edition of Patch Tuesday offers fixes for 7 critical flaws, including 5 RCE (remote code execution)… This is a post from HackRead.com Read the original post: Microsoft Patch Tuesday: Fixes for 0-Day and 74 Other Flaws Released
May's Patch Tuesday includes one actively exploited zero-day vulnerability and some other interesting ones. The post Update now! Microsoft releases patches, including one for actively exploited zero-day appeared first on Malwarebytes Labs.
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild. Of the 74 issues, seven are rated Critical, 66 are rated Important, and one is rated low in severity. Two of the flaws are listed as publicly known at the time of release. These encompass 24 remote code execution (RCE), 21 elevation of
Microsoft today released updates to fix at least 74 separate security problems in its Windows operating systems and related software. This month's patch batch includes fixes for seven "critical" flaws, as well as a zero-day vulnerability that affects all supported versions of Windows.
Microsoft's May 2022 Patch Tuesday contains several bugs in ubiquitous software that could affect millions of machines, researchers warn.
Windows LDAP Remote Code Execution Vulnerability. This CVE ID is unique from CVE-2022-22012, CVE-2022-22013, CVE-2022-22014, CVE-2022-29128, CVE-2022-29129, CVE-2022-29131, CVE-2022-29137, CVE-2022-29139, CVE-2022-29141.
Windows LDAP Remote Code Execution Vulnerability. This CVE ID is unique from CVE-2022-22013, CVE-2022-22014, CVE-2022-29128, CVE-2022-29129, CVE-2022-29130, CVE-2022-29131, CVE-2022-29137, CVE-2022-29139, CVE-2022-29141.
Windows LDAP Remote Code Execution Vulnerability. This CVE ID is unique from CVE-2022-22012, CVE-2022-22013, CVE-2022-22014, CVE-2022-29128, CVE-2022-29129, CVE-2022-29131, CVE-2022-29137, CVE-2022-29139, CVE-2022-29141.
Remote Procedure Call Runtime Remote Code Execution Vulnerability.
Windows Network File System Remote Code Execution Vulnerability.
By Jon Munshaw, with contributions from Jaeson Schultz. Microsoft returned to its normal monthly patching volume in May, disclosing and fixing 74 vulnerabilities as part of the company’s latest security update. This month’s Patch Tuesday includes seven critical vulnerabilities after Microsoft... [[ This is only the beginning! Please visit the blog for the complete entry ]]
By Jon Munshaw, with contributions from Jaeson Schultz. Microsoft returned to its normal monthly patching volume in May, disclosing and fixing 74 vulnerabilities as part of the company’s latest security update. This month’s Patch Tuesday includes seven critical vulnerabilities after Microsoft... [[ This is only the beginning! Please visit the blog for the complete entry ]]
Microsoft on Monday disclosed that it mitigated a security flaw affecting Azure Synapse and Azure Data Factory that, if successfully exploited, could result in remote code execution. The vulnerability, tracked as CVE-2022-29972, has been codenamed "SynLapse" by researchers from Orca Security, who reported the flaw to Microsoft in January 2022. <!--adsense--> "The vulnerability was specific to
An argument injection vulnerability in the browser-based authentication component of the Magnitude Simba Amazon Redshift JDBC Driver 1.2.40 through 1.2.55 may allow a local user to execute code. NOTE: this is different from CVE-2022-29972.
An argument injection vulnerability in the browser-based authentication component of the Magnitude Simba Amazon Redshift ODBC Driver (1.4.14 through 1.4.21.1001 and 1.4.22 through 1.4.x before 1.4.52) may allow a local user to execute arbitrary code.
Summary Microsoft recently mitigated a vulnerability in Azure Data Factory and Azure Synapse pipelines. The vulnerability was specific to the third-party Open Database Connectivity (ODBC) driver used to connect to Amazon Redshift in Azure Synapse pipelines and Azure Data Factory Integration Runtime (IR) and did not impact Azure Synapse as a whole. The vulnerability could … Vulnerability mitigated in the third-party Data Connector used in Azure Synapse pipelines and Azure Data Factory (CVE-2022-29972) Read More »
Unisphere for PowerMax versions prior to 9.2.2.2 contains a privilege escalation vulnerability. An adjacent malicious user could potentially exploit this vulnerability to escalate their privileges and access functionalities they do not have access to. CVE-2022-31233 addresses the partial fix in CVE-2021-36338.