Category Archives: Projects

Linux Patch Wednesday: here is this May peak!

Linux Patch Wednesday: here is this May peak! 🤦‍♂️ Also about June Linux Patch Wednesday. If you remember, in my post about the May Linux Patch Wednesday I was happy that, despite the launch of the rule for Unknown dates, the peak in May was insignificant. Although “32406 oval definitions without a date received a nominal date of 2024-05-15”. It turned out that the peak was not visible due to an error in the code. Ba-dum-tss! 🥸🤷‍♂️

I noticed that not all CVEs are in LPW bulletins, despite the addition of nominal dates, for example the high-profile vulnerability Elevation of Privilege (Local Privilege Escalation) – Linux Kernel (CVE-2024-1086). I could not find it anywhere. I debugged the function that distributes vulnerabilities into bulletins and added tests. I have ensured that all 38362 CVEs from the Linux OVAL content are actually distributed in bulletins. Including CVE-2024-1086. Here it is in February:

$ grep "CVE-2024-1086"  bulletins/*
bulletins/2024-02-21.json:        "CVE-2024-1086": [
bulletins/2024-02-21.json:                "title": "CVE-2024-1086 linux",
bulletins/2024-02-21.json:                "title": "CVE-2024-1086 linux",
bulletins/2024-02-21.json:                "title": "CVE-2024-1086 linux",

Well, there really is a peak in May. And how huge it is! 11476 CVEs! 😱 This is so much that I regenerated the Vulristics report for it only using 2 sources: Vulners and BDU. Since even from Vulners the data was not collected quickly enough. The report contains 77 vulnerabilities with signs of active exploitation in the wild and 1404 vulnerabilities with exploits, but without signs of active exploitation in the wild. Since for the most part these are old vulnerabilities for which it was simply not clear exactly when they were fixed, for example, Remote Code Execution – Apache HTTP Server (CVE-2021-42013), I will not analyze them in detail – for those interested, see the report. But please note that the report size is very large.

🗒 Vulristics report on the May Linux Patch Wednesday (31.3 MB)

As for the June Linux Patch Wednesday, which was finalized on June 19, there are 1040 vulnerabilities. Also quite a lot. Why is this so? On the one hand, the rule for Unknown dates added 977 Debian OVAL definitions without a date. Not 30k, like in May, but also significant. Out of 1040 vulnerabilities, 854 are Linux Kernel vulnerabilities. Moreover, there are quite a lot of “old” vulnerability identifiers, but created in 2024. For example, CVE-2021-47489 with NVD Published Date 05/22/2024. 🤔 CNA Linux Kernel is doing something strange.

🔻 With signs of exploitation in the wild again Remote Code Execution – Chromium (CVE-2024-5274, CVE-2024-4947), like in Microsoft Patch Tuesday. According to the BDU, Remote Code Execution – Libarchive (CVE-2024-26256) is also exploited in the wild.

🔸 Another 20 vulnerabilities with a public exploit. I can highlight separately Remote Code Execution – Cacti (CVE-2024-25641) and Remote Code Execution – onnx/onnx framework (CVE-2024-5187).

🗒 Vulristics report on the June Linux Patch Wednesday (4.4 MB)

June Microsoft Patch Tuesday

Leave a reply

June Microsoft Patch Tuesday. There are 69 vulnerabilities in total, 18 of which were added between May and June Patch Tuesday. Among these added were 2 vulnerabilities with signs of exploitation in the wild:

🔻 Remote Code Execution – Chromium (CVE-2024-5274, CVE-2024-4947). Both vulnerabilities are in CISA KEV; there are no exploits for them yet.

For the remaining vulnerabilities, there are no formal signs of exploitation in the wild or public exploits yet.

The specialized InfoSec media pay attention to these 2:

🔸 Remote Code Execution – Microsoft Message Queuing (MSMQ) (CVE-2024-30080). This vulnerability has a high CVSS Score of 9.8. To get RCE, the attacker sends a specially crafted malicious packet to the MSMQ server. The vulnerability may well become wormable for Windows servers with MSMQ enabled. It is very similar to last year’s QueueJumper (CVE-2023-21554).
🔸 Denial of Service – DNSSEC (CVE-2023-50868). Vulnerability in DNSSEC validation. An attacker can cause DoS using standard DNS integrity protocols. 🤷‍♂️ I don’t see any super criticality, but this is rare for MS Patch Tuesday, which is probably why everyone is writing about it.

What else you can pay attention to:

🔸 Elevation of Privilege – Windows Win32k (CVE-2024-30091), Windows Kernel (CVE-2024-30088, CVE-2024-30099) and Windows Cloud Files Mini Filter Driver (CVE-2024-30085). Why these? Microsoft’s CVSS states that there are private Proof-of-Concept exploits for them.
🔸 Remote Code Execution – Microsoft Office (CVE-2024-30101). This is a Microsoft Outlook vulnerability. To successfully exploit this vulnerability, a user must open a malicious email in an affected version of Microsoft Outlook and then perform certain actions to trigger the vulnerability. It’s enough to open the email in the Preview Pane. However, to successfully exploit this vulnerability, an attacker needs to win the race condition.
🔸 Remote Code Execution – Microsoft Outlook (CVE-2024-30103). Preview Pane is a vector. Authentication required. The vulnerability is somehow related to the creation of malicious DLL files. 🤷‍♂️
🔸 Remote Code Execution – Windows Wi-Fi Driver (CVE-2024-30078). An attacker can execute code on a vulnerable system by sending a specially crafted network packet. The victim must be within the attacker’s Wi-Fi range and use a Wi-Fi adapter. Sounds interesting, let’s wait for details. 😈
🔸 Remote Code Execution – Microsoft Office (CVE-2024-30104). An attacker must send the user a malicious file and convince the user to open the file. The Preview Pane is NOT an attack vector.

🗒 Vulristics report on June Microsoft Patch Tuesday

На русском

May Linux Patch Wednesday

Leave a reply

May Linux Patch Wednesday. Last month, we jointly decided that it was worth introducing a rule for Unknown dates starting from May 2024. Which, in fact, is what I implemented. Now, if I see an oval definition that does not have a publication date (date when patches for related vulnerabilities were available), then I nominally assign today’s date. Thus, 32406 oval definitions without a date received a nominal date of 2024-05-15. One would expect that we would get a huge peak for vulnerabilities that “started being patched in May” based on the nominal date. How did it really turn out?

In fact, the peak was not very large. There are 424 CVEs in the May Linux Patch Wednesday. While in April there were 348. It’s comparable. Apparently the not very large peak is due to the fact that most of the vulnerabilities had patch dates older than the nominal one set (2024-05-15). And this is good. 🙂 It should get even better in June.

As usual, I generated a Vulristics report for the May vulnerabilities. Most of the vulnerabilities (282) relate to the Linux Kernel. This is due to the fact that Linux Kernel is now a CNA and they can issue CVEs for all sorts of things like bugs with huge traces right in the vulnerability descriptions.

The vulnerability from CISA KEV comes first.

🔻Path Traversal – Openfire (CVE-2023-32315). This is the August 2023 trending vulnerability. It was included in the report due to a fix in RedOS 2024-05-03. Has it not been fixed in other Linux distributions? It looks like this. In Vulners, among the related security objects, we can only see the RedOS bulletin. Apparently there are no Openfire packages in the repositories of other Linux distributions.

In second place is a vulnerability with a sign of active exploitation according to AttackerKB.

🔻 Path Traversal – aiohttp (CVE-2024-23334). The bug allows unauthenticated attackers to access files on vulnerable servers.

According to data from the FSTEC BDU, another 16 vulnerabilities have signs of active exploitation in the wild.

🔻 Memory Corruption – nghttp2 (CVE-2024-27983)
🔻 Memory Corruption – Chromium (CVE-2024-3832, CVE-2024-3833, CVE-2024-3834, CVE-2024-4671)
🔻 Memory Corruption – FreeRDP (CVE-2024-32041, CVE-2024-32458, CVE-2024-32459, CVE-2024-32460)
🔻 Memory Corruption – Mozilla Firefox (CVE-2024-3855, CVE-2024-3856)
🔻 Security Feature Bypass – bluetooth_core_specification (CVE-2023-24023)
🔻 Security Feature Bypass – Chromium (CVE-2024-3838)
🔻 Denial of Service – HTTP/2 (CVE-2023-45288)
🔻 Denial of Service – nghttp2 (CVE-2024-28182)
🔻 Incorrect Calculation – FreeRDP (CVE-2024-32040)

Another 22 vulnerabilities have an exploit (public or private), but so far there are no signs of active exploitation in the wild. I won’t list them all here, but you can pay attention to:

🔸 Security Feature Bypass – putty (CVE-2024-31497). A high-profile vulnerability that allows an attacker to recover a user’s private key.
🔸 Remote Code Execution – GNU C Library (CVE-2014-9984)
🔸 Remote Code Execution – Flatpak (CVE-2024-32462)
🔸 Command Injection – aiohttp (CVE-2024-23829)
🔸 Security Feature Bypass – FreeIPA (CVE-2024-1481)

I think that to improve the Vulristics report, it makes sense to separately group vulnerabilities with public exploits and private exploits, since this still greatly affects the criticality. Put 🐳 if you would like to see this feature.

🗒 Vulristics report on the May Linux Patch Wednesday

На русском

May Microsoft Patch Tuesday

Leave a reply

May Microsoft Patch Tuesday. There are 91 vulnerabilities in total. Of those, 29 were added between April and May Patch Tuesday.

Two vulnerabilities have signs of exploitation in the wild and the presence of a functional exploit (not yet public):

🔻 Security Feature Bypass – Windows MSHTML Platform (CVE-2024-30040). In fact, an attacker can execute arbitrary code when the victim opens a specially crafted document. It is exploited through phishing.
🔻 Elevation of Privilege – Windows DWM Core Library (CVE-2024-30051). A local attacker can gain SYSTEM privileges on the vulnerable host. Microsoft credits four different groups for reporting the bug, indicating that the vulnerability is being widely exploited. The vulnerability is associated with the QakBot malware.

Among the rest we can note:

🔸 Security Feature Bypass – Windows Mark of the Web (CVE-2024-30050). Such vulnerabilities have been frequently exploited recently. Microsoft indicates that there is a functional exploit (private) for the vulnerability.
🔸 Remote Code Execution – Microsoft SharePoint Server (CVE-2024-30044). An authenticated attacker with Site Owner privileges or higher can execute arbitrary code in the context of SharePoint Server by uploading a specially crafted file.
🔸 Elevation of Privilege – Windows Search Service (CVE-2024-30033). ZDI believes that the vulnerability has the potential to be exploited in the wild.
🔸 Remote Code Execution – Microsoft Excel (CVE-2024-30042). An attacker can execute code, presumably in the user’s context, when a malicious file is opened.

🗒 Vulristics report

На русском

4 RCEs in HPE Aruba Networking devices

Leave a reply

4 RCEs in HPE Aruba Networking devices. All 4 vulnerabilities relate to buffer overflows in various ArubaOS services. ArubaOS is a network operating system for Aruba networking equipment, including switches, access points, and gateways. The company’s main focus is on wireless networks.

All 4 vulnerabilities are exploited via requests to the Process Application Programming Interface (PAPI), UDP port 8211, no authentication required. All have CVSS 9.8.

Vulnerable Products:

🔻 Mobility Conductor (formerly Mobility Master)
🔻 Mobility Controllers
🔻 Aruba Central manages WLAN Gateways and SD-WAN Gateways

Updates are available for minor versions of ArubaOS 8 and 10. Legacy versions of ArubaOS and SD-WAN are also vulnerable.

Now is the time to check if you have anything from HPE Aruba on your network before an exploit appears. 😉

На русском

I generated a Vulristics report on the April Linux Patch Wednesday

Leave a reply

I generated a Vulristics report on the April Linux Patch Wednesday. Over the past month, Linux vendors have begun releasing patches for a record number of vulnerabilities – 348. There are signs of exploitation in the wild for 7 vulnerabilities (data on incidents from the FSTEC BDU). Another 165 have a link to an exploit or a sign of the existence of a public/private exploit.

Let’s start with 7 vulnerabilities with signs of exploitation in the wild and exploits:

🔻 The trending January vulnerability Authentication Bypass – Jenkins (CVE-2024-23897) unexpectedly appeared in the TOP. As far as I understand, Linux distributions usually do not include Jenkins packages in the official repositories and, accordingly, do not add Jenkins vulnerability detection rules to their OVAL content. Unlike the Russian Linux distribution RedOS. Therefore, RedOS has the earliest fix timestamp for this vulnerability.

🔻 2 RCE vulnerabilities. The most interesting of them is Remote Code Execution – Exim (CVE-2023-42118). When generating the report, I deliberately did not take into account the vulnerability description and product names from the BDU database (flags –bdu-use-product-names-flag, –bdu-use-vulnerability-descriptions-flag set to False). Otherwise, the report would be partly in English and partly in Russian. But it turned out that so far only BDU has an adequate description of this vulnerability. 🤷‍♂️ You need to take a closer look at this vulnerability because Exim is a fairly popular mail server. The second RCE vulnerability is in the web browser, Remote Code Execution – Safari (CVE-2023-42950).

🔻2 DoS vulnerabilities. Denial of Service – nghttp2/Apache HTTP Server (CVE-2024-27316) and Denial of Service – Apache Traffic Server (CVE-2024-31309). The second is classified in the report as Security Feature Bypass, but this is due to incorrect CWE in NVD (CWE-20 – Improper Input Validation)

🔻 2 browser vulnerabilities Security Feature Bypass – Chromium (CVE-2024-2628, CVE-2024-2630)

Among the vulnerabilities for which there are only signs of the existence of exploits so far, you can pay attention to the following:

🔸 A large number of RCE vulnerabilities (71). Most of them are in the gtkwave product. This is a viewer for VCD (Value Change Dump) files, which are typically created by digital circuit simulators. Also, the Remote Code Execution – Cacti (CVE-2023-49084, CVE-2023-49085) vulnerabilities look dangerous. Cacti is a solution for monitoring servers and network devices.

🔸 Security Feature Bypass – Sendmail (CVE-2023-51765). Allows an attacker to inject email messages with a spoofed MAIL FROM address.

🔸 A pack of Cross Site Scripting vulnerabilities in MediaWiki, Cacti, Grafana, Nextcloud.

There is a lot to explore this time. 🤩

🗒 April Linux Patch Wednesday

На русском

First impressions of the April Microsoft Patch Tuesday

Leave a reply

First impressions of the April Microsoft Patch Tuesday. I don’t even know what to write. 🤪 Very strange! 173 vulnerabilities, of which 23 were added since the last Patch Tuesday.

Microsoft flags one vulnerability as being exploited in the wild: Spoofing – Proxy Driver (CVE-2024-26234). And only Qualys briefly mentions it. Literally like this: “Microsoft has not disclosed any information about the vulnerability”. 😅 ZDI also claims that Security Feature Bypass – SmartScreen Prompt (CVE-2024-29988) is being exploited in the wild, which is a Mark of the Web (MotW) bypass.

There are no exploits for anything yet. The following vulnerabilities can be highlighted:

🔸 Remote Code Execution – Microsoft Excel (CVE-2024-26257). Can be exploited by an attacker when the victim opens a specially crafted file.
🔸 Remote Code Execution – RPC (CVE-2024-20678). It is highlighted by ZDI, which also claims 1.3 million exposed TCP 135 ports.
🔸 Spoofing – Outlook for Windows (CVE-2024-20670). ZDI writes that this is an Information Disclosure vulnerability that can be used in NTLM relay attacks.
🔸 Remote Code Execution – Windows DNS Server (CVE-2024-26221, CVE-2024-26222, CVE-2024-26223, CVE-2024-26224, CVE-2024-26227, CVE-2024-26231, CVE-2024-26233). Maybe some of this will be exploited in the wild, ZDI particularly highlights CVE-2024-26221.
🔸 Remote Code Execution – Microsoft Defender for IoT (CVE-2024-21322, CVE-2024-21323, CVE-2024-29053). It is an IoT and ICS/OT security solution that can be deployed on-prem.

There are simply indecently massive fixes:

🔹 Remote Code Execution – Microsoft OLE DB Driver for SQL Server / Microsoft WDAC OLE DB Provider for SQL Server / Microsoft WDAC SQL Server ODBC Driver. 28 CVEs! I won’t even list everything here. 😨
🔹 Security Feature Bypass – Secure Boot. 23 CVEs!

🗒 Vulristics report

На русском

Upd. 10.04 I slightly tweaked the vulnerability type detection to increase the priority of the detection based on the Microsoft generated description compared to the detection based on CWE. In particular, the type of vulnerability for Spoofing – Proxy Driver (CVE-2024-26234) and Spoofing – Outlook for Windows (CVE-2024-20670) has changed.

Alexander V. Leonov

Vulnerability Management and more

Category Archives: Projects

Linux Patch Wednesday: here is this May peak!

June Microsoft Patch Tuesday

May Linux Patch Wednesday

May Microsoft Patch Tuesday

4 RCEs in HPE Aruba Networking devices

I generated a Vulristics report on the April Linux Patch Wednesday

First impressions of the April Microsoft Patch Tuesday