PoC for critical ManageEngine bug to be released, so get patching! (CVE-2022-47966)
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2022-47966 | Unauthenticated SAML RCE in Zoho ManageEngine On-Premise Products CVE-2022-47966 is a critical (CVSS 9.8), unauthenticated remote code execution flaw in roughly two dozen Zoho ManageEngine on-premise products caused by their bundled Apache Santuario xmlsec (XML Security for Java) 1.4.1 library, in which the XSLT features leave security protections to the application and ManageEngine did not provide them. An attacker triggers the flaw by sending a crafted SAML response containing a malicious XSLT transform to the SAML single sign-on (SSO) endpoint; exploitation is only possible if SAML SSO has ever been configured for the product (for some products, SAML SSO must be currently active). Successful exploitation yields arbitrary code execution in the context of the affected ManageEngine application, typically full compromise of the server and a foothold into the wider enterprise network. Any organization running an affected product version with SAML SSO enabled is affected, with internet-exposed ITSM/identity-management servers the most likely targets. Exploitation is confirmed in the wild: the flaw is in CISA KEV with known ransomware use, Rapid7 reported broad attacker interest, North Korea's Lazarus Group used it to deploy QuiteRAT, and Iranian government-backed actors have targeted U.S. energy and transit-sector organizations. Do: Apply vendor updates immediately, upgrading each installed product to at least the fixed version listed (e.g., ServiceDesk Plus 14004+, ADSelfService Plus 6211+, Endpoint Central/Endpoint Central MSP 10.1.2228.11+, Password Manager Pro 12124+, ServiceDesk Plus MSP 13001+, ADAudit Plus 7081+, ADManager Plus 7162+, AD360 4310+); this is a CISA KEV required action. As an interim mitigation, disable or restrict SAML SSO (or limit access to the product's SSO endpoints), since SAML SSO must have been configured for exploitation. Prioritize patching internet-exposed instances and review those servers for signs of compromise, given documented use by Lazarus Group, ransomware operators, and Iranian nation-state actors. | 9.8 | 100% | KEV ransomware PoC ×6 |
| largetens of thousands of installations plausibly affected (thousands of instances internet-exposed), out of ManageEngine's very large on-prem install base |
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If your enterprise is running ManageEngine products that were affected by CVE-2022-47966, check now whether they’ve been updated to a non-vulnerable version because Horizon3.ai will be releasing technical details and a PoC exploit this week.
GreyNoise has yet to detect in-the-wild exploitation attempts, but you better believe they are coming. “The vulnerability is easy to exploit and a good candidate for attackers to ‘spray and pray’ across the Internet,” vulnerability researcher James Horseman opined.
About CVE-2022-47966
CVE-2022-47966 is an unauthenticated remote code execution vulnerability that has been found by a researcher with Viettel Cyber Security in two dozen ManageEngine products, including Access Manager Plus, ADSelfService Plus, Endpoint DLP, Password Manager Pro, PAM360, ServiceDesk Plus, and others.
The source of the vulnerability was an outdated version of the Apache Santuario library, which provides implementation of security standards for XML. The vulnerability is only exploitable if SAML single sign-on is currently or has been previously enabled on those products, and can be exploited by crafting a SAML request with an invalid signature.
“This issue has been fixed by updating the third party module to the recent version,” ManageEngine shared. The company released fixed versions of each product throughout October and November 2022 and, hopefully, most organizations have already upgraded their installations.
Mitigate the risk and check for evidence of exploitation
Attackers often take advantage of flaws in Zoho’s ManageEngine offerings.
“ManageEngine products are some of the most widely used across enterprises and perform business functions such as authentication, authorization, and identity management. Given the nature of these products, a vulnerability such as this poses critical risk to organizations allowing attackers initial access, if exposed to the internet, and the ability for lateral movement with highly privileged credentials,” Horseman pointed out.
He and his colleagues have reproduced the CVE-2022-47966 exploit and have shared indicators of compromise (IoCs) that can help organizations’ defenders look for evidence of compromise.
“Once an attacker has SYSTEM level access to the endpoint, attackers are likely to begin dumping credentials via LSASS or leverage existing public tooling to access stored application credentials to conduct lateral movement. If a user determines they have been compromised, additional investigation is required to determine any damage an attacker has done,” he added.
Luckily for ManageEngine’s customers’, this vulnerability is still not being exploited and they can prevent being affected by it by upgrading products sooner rather than later.
UPDATE (January 19, 2023, 04:40 a.m. ET):
The researcher who unearthed the vulnerability has published additional technical details.
UPDATE (January 19, 2023, 09:20 a.m. ET):
And here’s Horizon3.ai’s PoC and a technical post on how they found the vulnerability by analyzing its patch.
UPDATE (January 20, 2023, 09:40 a.m. ET):
Exploitation attempts have been flagged by GreyNoise and Shadowserver.
Rapid7 is currently “responding to various compromises arising from the exploitation of CVE-2022-47966.”
Text extracted automatically; images, tables and formatting may be missing. Original: https://www.helpnetsecurity.com/2023/01/17/cve-2022-47966-poc/