Ivanti Releases Zero
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2024-21887 +1 in the same advisory: …46805 | Command Injection RCE in Ivanti Connect Secure and Policy Secure Ivanti Connect Secure (formerly Pulse Connect Secure) and Ivanti Policy Secure appliances contain a command injection flaw (CWE-77) in their web components, triggered when an authenticated administrator sends crafted requests to the appliance. The bug can be chained with the separate authentication bypass CVE-2023-46805, allowing an unauthenticated attacker to achieve the same result. Successful exploitation lets an attacker execute arbitrary commands and code on the appliance, providing a foothold into the networks behind the VPN or network access control gateway. Any organization running these appliances, typically enterprises and government agencies often deployed directly on the internet perimeter, is affected. Exploitation is confirmed in the wild: the flaw was added to CISA's Known Exploited Vulnerabilities catalog on 2024-01-10 with known ransomware use and EPSS assigns a 100% probability of exploitation within 30 days, although no public proof-of-concept is available. Do: Apply Ivanti's mitigations or patched builds immediately per vendor instructions, addressing the chained authentication bypass CVE-2023-46805 at the same time, and discontinue or restrict use of any appliance for which mitigations are unavailable, especially if it is internet-facing. Because exploitation with ransomware use is known, assume compromise is possible: review appliance web logs for suspicious requests and run Ivanti's integrity-checking guidance to verify appliance images before and after remediation. Where feasible, restrict direct internet exposure of the appliance web interface and monitor for further vendor advisories. | 9.1 group max | 100% | KEV ransomware PoC |
| largetens of thousands of appliances (roughly 20,000-30,000 internet-exposed ICS gateways at disclosure; total deployed base likely higher) | |
| CVE-2024-21888 | A privilege escalation vulnerability in web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows a user to elevate privile A privilege escalation vulnerability in web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows a user to elevate privileges to that of an administrator. NVD description · AI analysis pending | 8.8 | 87% |
| — | ||
| CVE-2024-21893 | SSRF in Ivanti Connect Secure, Policy Secure, and Neurons SAML Component CVE-2024-21893 is a server-side request forgery (SSRF) vulnerability in the SAML component of Ivanti Connect Secure (formerly Pulse Connect Secure), Ivanti Policy Secure, and Ivanti Neurons. A remote attacker can trigger the flaw with crafted unauthenticated requests to the SAML component, causing the appliance to make requests to otherwise restricted resources. Successful exploitation allows the attacker to access certain restricted resources without any credentials, and CISA notes the flaw has been used in ransomware operations. Any organization running an affected Ivanti Connect Secure, Policy Secure, or Neurons deployment is exposed, particularly where the appliance is reachable from the internet. The vulnerability is confirmed exploited in the wild: it was added to CISA's Known Exploited Vulnerabilities catalog on 2024-01-31, carries an EPSS probability of 100%, and no public proof-of-concept is known. Do: Apply Ivanti's released patches or the vendor-issued mitigations immediately per vendor instructions, or discontinue use of the product if mitigations are unavailable, as required by CISA. Because ransomware use is documented, review SAML-related logs and appliance audit trails for signs of exploitation and follow-on compromise, and check for indicators of post-exploitation activity. Monitor Ivanti advisories for patched version numbers and updated mitigation guidance, since specific fixed versions are not yet specified in the available data. | 8.2 | 100% | KEV ransomware |
| largetens of thousands of internet-exposed appliances (with total user counts likely in the hundreds of thousands) |
Full article574 words · extracted from infosecurity-magazine.com · click to collapse
Ivanti has finally released patches for two critical zero-day vulnerabilities, but said the update also covers two new bugs – one of which is being actively exploited in attacks.
Ivanti released details of CVE-2023-46805 and CVE-2024-21887 in mid-January, although it’s believed that Chinese actor UTA0178 (aka UNC5221) had been exploiting them as far back as early December 2023.
The zero-days impact its Connect Secure VPN product and Policy Secure network access control (NAC) offering and can be chained to allow an unauthenticated actor to craft malicious requests and execute arbitrary commands on the system.
New Vulnerabilities in Ivanti Connect Secure
Its new advisory published on January 31 – a week later than expected – included fixes for these and two newly discovered vulnerabilities.
- CVE-2024-21888 is a privilege escalation vulnerability in the web component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x), which allows a user to elevate privileges to that of an administrator. It has a CVSS score of 8.8.
- CVE-2024-21893 is a server-side request forgery flaw in the SAML component of Ivanti Connect Secure (9.x, 22.x), Ivanti Policy Secure (9.x, 22.x) and Ivanti Neurons for ZTA, which allows an attacker to access certain restricted resources without authentication. It has a CVSS score of 8.2.
Ivanti claimed the latter is being actively exploited in the wild, with a “limited number of customers” currently impacted.
“We are reporting these vulnerabilities in this knowledge base article as it is resolved in the patch detailed below. We have also provided new mitigation for supported versions where the patch has not been released,” the security vendor continued.
“At the time of publication, the exploitation of CVE-2024-21893 appears to be targeted. Ivanti expects the threat actor to change their behavior and we expect a sharp increase in exploitation once this information is public – similar to what we observed on 11 January following the 10 January disclosure.”
Read more on Ivanti vulnerabilities: Ivanti Zero-Days Exploited By Multiple Actors Globally
Ivanti urged customers to factory reset their appliances before applying the patch, in order to prevent threat actors from gaining “upgrade persistence” in their environment.
“Historically we have seen this threat actor attempt to gain persistence in customers’ environment, which is why we are recommending this action as a best practice for all customers,” it added. “The remaining patches for supported versions will still be released on a staggered schedule. The timing of patch release is subject to change as we prioritize the security and quality of each release.”
Mandiant Discovers New Malware
In related news, security researchers discovered several new pieces of malware during their investigation of post-exploitation activity linked to the original Ivanti zero-day vulnerabilities.
Mandiant claimed to have identified “broad exploitation activity” from both UNC5221 and other unknown threat groups – with a “significant portion” performed through automated methods.
It listed a new webshell dubbed Bushwalk, which is being used in highly targeted attacks to bypass the initial mitigation provided by Ivanti on January 10. Also revealed by Mandiant were additional custom webshells, Framesting and Chainline, which enable arbitrary command execution.
“Mandiant has observed UNC5221 targeting a wide range of verticals of strategic interest to the People’s Republic of China (PRC) both pre and post disclosure, and early indications show that tooling and infrastructure overlap with past intrusions attributed to suspected China-based espionage actors,” Mandiant concluded.
“Additionally, Linux-based tools identified in incident response investigations use code from multiple Chinese-language Github repositories.”
Text extracted automatically; images, tables and formatting may be missing. Original: https://www.infosecurity-magazine.com/news/ivanti-zeroday-patches-two-new-bugs/