Trending vulnerabilities for June according to Positive Technologies

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Trending vulnerabilities for June according to Positive Technologies. Traditionally, in 3 formats (in Russian):

📹 The section “Trending VM” in the SecLab news video (starts at 15:03)
🗞 Post on the Habr website, in fact this is a slightly expanded scenario for the “Trending VM” section
🗒 Compact digest with technical details on the official PT website

List of vulnerabilities:

🔻 EoP in Microsoft Windows CSC (CVE-2024-26229)
🔻 EoP in Microsoft Windows Error Reporting (CVE-2024-26169)
🔻 EoP in Microsoft Windows Kernel (CVE-2024-30088)
🔻 RCE in PHP (CVE-2024-4577)
🔻 EoP in Linux Kernel (CVE-2024-1086)
🔻 InfDisclosure in Check Point Security Gateways (CVE-2024-24919)
🔻 RCE in VMware vCenter (CVE-2024-37079, CVE-2024-37080)
🔻 AuthBypass in Veeam Backup & Replication (CVE-2024-29849)

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I watched a joint webinar by Vulners and RST Cloud about Vulnerability Prioritization

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I watched a joint webinar by Vulners and RST Cloud about Vulnerability PrioritizationI watched a joint webinar by Vulners and RST Cloud about Vulnerability PrioritizationI watched a joint webinar by Vulners and RST Cloud about Vulnerability PrioritizationI watched a joint webinar by Vulners and RST Cloud about Vulnerability Prioritization

I watched a joint webinar by Vulners and RST Cloud about Vulnerability Prioritization.

🔹 Kir Ermakov from Vulners spoke about the importance of prioritizing vulnerabilities (especially for MSSP companies, since they are responsible for customer security) and how it can be improved using dynamically updated AI Score v2. I really liked his phrase: “if you don’t know your assets very well, turn off the webinar and go do Asset Management”. Asset Management is the base. 👍

🔹 Yury Sergeev from RST Cloud told how, when prioritizing vulnerabilities, take into account data on the exploitation of vulnerabilities in real attacks (in your location, in your industry, for your attacker profile). He provided a formula and demonstrated how taking these factors into account affects prioritization. I liked his regreSSHion example: there is a lot of hype, but the attack is very noticeable and takes a lot of time, so the exploitation is unlikely to be widespread.

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Lifting Zmiy and КУН-IP8

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Lifting Zmiy and КУН-IP8

Lifting Zmiy and КУН-IP8. Solar released an interesting article about the group Lifting Zmiy. The group hosts its control servers (C2) on compromised programmable logic controllers (PLC). In particular, on the “Концентратор универсальный КУН-IP8” for elevator control, developed by Tekon-Avtomatika.

Why КУН-IP8:

🔻 It has Linux-based firmware and a module for loading and executing custom LUA script plugins as root (allows you to execute any bash commands as root).

🔻 Often the web interfaces of such PLCs are accessible directly on the Internet, even with the default administrator login/password. 🤦‍♂️ More than a hundred hosts can be found using Google Dorks.

If you have a piece of hardware that is accessible from the Internet and you do not secure it and update it, then it is very likely that criminals will start using it. For example, in attacks on critical infrastructure. And then YOU will have to prove you had nothing to do with it.

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Attackers are distributing malware on social networks under the guise of the regreSSHion exploit (CVE-2024-6387)

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Attackers are distributing malware on social networks under the guise of the regreSSHion exploit (CVE-2024-6387)

Attackers are distributing malware on social networks under the guise of the regreSSHion exploit (CVE-2024-6387). According to Kaspersky Lab experts, this is an attack on cybersecurity specialists. The attackers invite victims to examine an archive that supposedly contains a functional regreSSHion exploit, a list of IP addresses, and some payload.

🔻 The source code resembles a slightly edited version of a non-functional proof-of-concept exploit for this vulnerability that was already public.

🔻 One of the Python scripts simulates the exploitation of the vulnerability on IP addresses from the list. But in reality, it launches malware that achieves persistence in the system and downloads additional payload. The malware modifies /etc/cron.hourly and the operation of the ls command.

If you are examining someone else’s code, do so in a securely isolated environment and be aware that you may be attacked this way. 😉

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Microsoft is beginning to add CVEs to address security flaws in its cloud services

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Microsoft is beginning to add CVEs to address security flaws in its cloud services

Microsoft is beginning to add CVEs to address security flaws in its cloud services. It’s not as straightforward. Assume a cloud CRM has a vulnerability. The vendor instantly corrected it for everyone, and clients didn’t need to take any action. What good is it to issue a CVE for this? 🤔

But Microsoft believes it’s required for greater transparency, and the new rules require CNAs (CVE Numbering Authorities) to add vulnerabilities that could cause significant harm, regardless of whether customers have to take action to fix the vulnerabilities or not. 🤷‍♂️

Microsoft promises to mark such vulnerabilities, such as CVE-2024-35260 “CVE requires no customer action to resolve”. There will be a special tag in CVEorg as well.

Whether or not it is necessary to register cloud service vulnerabilities as CVE is a controversial issue. But it is a fact that, due to this practice, the number of identifiers in CVEorg/NVD will grow much faster. 🤷‍♂️

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OpenSSH “regreSSHion” RCE with root privileges (CVE-2024-6387)

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OpenSSH regreSSHion RCE with root privileges (CVE-2024-6387)

OpenSSH “regreSSHion” RCE with root privileges (CVE-2024-6387). The vulnerability was discovered by Qualys. An unauthenticated remote attacker can execute arbitrary code as root. It sounds creepy. 😱🙂

This vulnerability is a regression of the CVE-2006-5051. For it, by the way, there are no signs of exploitation in the wild or exploits.

🔻 The regression happened in October 2020, starting with OpenSSH version 8.5p1
🔻 “glibc-based Linux systems” in default configuration are vulnerable, OpenBSD is not vulnerable
🔻 There are 14 million potentially vulnerable hosts on the Internet
🔻 Qualys promise not to publish the exploit, but third-party researchers can write it based on the detailed write-up

Vulnerable versions:

❌ OpenSSH < 4.4p1
❌ 8.5p1 <= OpenSSH < 9.8p1 Invulnerable versions: ✅ 4.4p1 <= OpenSSH < 8.5p1
✅ OpenSSH >= 9.8p1

Upd. Attacking a 32-bit system with ASLR in laboratory conditions took 6-8 hours. Apparently the process is not so easy. 😉

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The severity of the Elevation of Privilege – Windows Kernel (CVE-2024-30088) has increased

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The severity of the Elevation of Privilege - Windows Kernel (CVE-2024-30088) has increased

The severity of the Elevation of Privilege – Windows Kernel (CVE-2024-30088) has increased. The vulnerability is fresh, it is from the June Microsoft Patch Tuesday. I highlighted it in the review because, according to the CVSS vector, there was a private Proof-of-Concept Exploit for it. But there were no details. It was only clear that in case of successful exploitation, the attacker gains SYSTEM privileges. According to the ZDI advisory, the vulnerability affects the implementation of NtQueryInformationToken and is due to the lack of proper locking when performing operations on the object.

On June 24, 2 weeks after the June Patch Tuesday, a repository with technical details on this vulnerability and PoC appeared on GitHub. A video of running the utility to obtain SYSTEM privileges is also available.

A lot of exploits have begun to appear for Windows EoP/LPE vulnerabilities recently. Fix them in advance!

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