All Posts in The Laws of Vulnerabilities

541 posts

January 2020 Patch Tuesday – 50 Vulns, 8 Critical, Adobe Vulns

This month’s Microsoft Patch Tuesday addresses 50 vulnerabilities with only 8 of them labeled as Critical. Of the 8 Critical vulns, one is for browser and scripting engines, 3 are for .NET Framework and one for ASP.NET. In addition, Microsoft has patched 3 critical RCEs in Remote Desktop Gateway and Remote Desktop Client. Adobe issued patches today for Illustrator CC and Experience Manager.

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Citrix ADC and Gateway Remote Code Execution Vulnerability (CVE-2019-19781)

Update January 17, 2020: A new detection in Qualys Web Application Scanning was added. See “Detecting with Qualys WAS” below.

Citrix released a security advisory (CVE-2019-19781) for a remote code execution vulnerability in Citrix Application Delivery Controller (ADC) and Citrix Gateway products. The vulnerability allows an unauthenticated remote attacker to execute arbitrary code on the system. Once exploited, remote attackers could obtain access to private network resources without requiring authentication.

During the week of January 13, attacks on Citrix appliances have intensified. Because of the active attacks and the ease of exploitation, organizations are advised to pay close attention.

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OpenBSD Local Privilege Escalation Vulnerability (CVE-2019-19726)

Qualys Research Labs discovered a local privilege escalation vulnerability in OpenBSD’s dynamic loader. The vulnerability could allow local users or malicious software to gain full root privileges. OpenBSD developers have confirmed the vulnerability and released security patches in less than 3 hours.

Qualys Research Labs also provided proof-of-concept exploits in the security advisory.

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December 2019 Patch Tuesday – 36 Vulns, 7 Critical, Actively Attacked Win32k vuln, Adobe vulns

This month’s Patch Tuesday is rather light and addresses 36 vulnerabilities, with only 7 labeled as Critical. Five of the seven Critical vulns are in Git for Visual Studio. The others are for Hyper-V and Win32k. Also, there is one actively attacked “Important” vuln in Win32k. Adobe released patches today covering Acrobat/Reader, ColdFusion, Photoshop, and Brackets.

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OpenBSD Multiple Authentication Vulnerabilities

Multiple authentication vulnerabilities in OpenBSD have been disclosed by Qualys Research Labs. The vulnerabilities are assigned following CVEs: CVE-2019-19522, CVE-2019-19521, CVE-2019-19520, CVE-2019-19519. OpenBSD developers have confirmed the vulnerabilities and also provided a quick response with patches published in less than 40 hours.

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November 2019 Patch Tuesday – 74 vulns, 13 Critical, Actively Attacked IE vuln, Hyper-V escapes, Adobe

This month’s Microsoft Patch Tuesday addresses 74 vulnerabilities with 13 of them labeled as Critical. Of the 13 Critical vulns, 5  are for browsers and scripting engines. Out of the 8 remaining Critical vulns, 4 are potential hypervisor escapes in Hyper-V, as well as vulnerabilities in Microsoft Exchange, Win32k, Windows Media Foundations, and OpenType. Adobe’s Patch Tuesday was on time this month, and covers 11 vulns spread across Animate, Illustrator, Media Encoder, and Bridge.

UPDATE
There are reports that the CVE-2019-1402 patches are causing issues with all supported versions of Microsoft Access. Microsoft has posted a document on the issue with upcoming fix dates and workarounds.

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BlueKeep Attacks Observed Months after Initial Release

The BlueKeep vulnerability, initially released in May 2019, is currently being exploited in the wild. Cybersecurity researchers have spotted initial attacks of Bluekeep RDP vulnerability. Here’s a reminder about BlueKeep and instructions for using Qualys to identify attacks and remediate this vulnerability.

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October 2019 Patch Tuesday – 59 vulns, 9 Critical, Azure App Service, Remote Desktop Client, PoC for Windows Error Reporting

This month’s Microsoft Patch Tuesday addresses 59 vulnerabilities with only 9 of them labeled as Critical. Of the 9 Critical vulns, 7 of them are for browsers and scripting engines. The remaining 2 are for Azure App Service and Remote Desktop Client. In addition, PoC code has been published for an Important Windows Error Reporting vulnerability. Adobe has not posted any patches for Patch Tuesday, but did issue out-of-band patches for ColdFusion on September 24th.

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Microsoft Released Out-of-Band Security Updates – How to Detect and Remediate

Microsoft released an out-of-band update yesterday that fixes two critical vulnerabilities – The Internet Explorer remote code execution vulnerability (CVE-2019-1367) and Microsoft Defender Denial of Service Vulnerability (CVE-2019-1255).

According to the Microsoft advisory CVE-2019-1367, the Internet Explorer scripting engine vulnerability has been exploited in active attacks in the wild. Users are advised to manually update their systems immediately.

UPDATE: Added methods to detect Internet Explorer installs vulnerable to CVE-2019-1367 using only Free Qualys Global IT Asset Inventory, as well as how to patch by CVE with Qualys Patch Management.

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September 2019 Patch Tuesday – 79 Vulns, 17 Critical, Remote Desktop Client, SharePoint, Exploited PrivEsc

This month’s Microsoft Patch Tuesday addresses 79 vulnerabilities with 17 of them labeled as Critical. Of the 17 Critical vulns, 8 are for scripting engines and browsers, 4 are for the Remote Desktop Client, and 3 are for SharePoint. In addition, Microsoft has again patched a critical vulnerability in LNK files, along with a vuln in Azure DevOps / TFS. Adobe has also released patches for Flash and Application Manager.

Update: Following Patch Tuesday, Microsoft updated the entries for CVE-2019-1214 and CVE-2019-1215 to remove the “exploited” label.

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