Zoho ManageEngine Multiple Products Remote Code Execution
CVE-2022-35405 is a critical-severity deserialization of untrusted data vulnerability in Manageengine Access Manager Plus from Zoho, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 4.3 as the first without the flaw, so updating Manageengine Access Manager Plus to that release or later removes the exposure. CISA added it to the Known Exploited Vulnerabilities catalogue on September 22, 2022, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update Manageengine Access Manager Plus to 4.3 or a later version.
- Update Manageengine Pam360 to 5.5 or a later version.
- Update Manageengine Password Manager Pro to 12.1 or a later version.
- CISA's required action: Apply updates per vendor instructions.
- Read the advisory on manageengine.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Zoho | Manageengine Access Manager Plus | before 4.3; 4.3 | 4.3 |
| Zoho | Manageengine Pam360 | before 5.5; 5.5 | 5.5 |
| Zoho | Manageengine Password Manager Pro | before 12.1; 12.1 | 12.1 |
Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.1 | 9.8 | Critical | CISA (ADP) |
Official description
Zoho ManageEngine Password Manager Pro before 12101 and PAM360 before 5510 are vulnerable to unauthenticated remote code execution. (This also affects ManageEngine Access Manager Plus before 4303 with authentication.)
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How developers prevent this class of flaw
- If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
- When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
- Explicitly define a final object() to prevent deserialization.
More Deserialization of Untrusted Data vulnerabilities (CWE-502)
Timeline
- CVE record published.
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-35405US Government Resource
Technical write-ups (may include proof of concept)
- packetstormsecurity.com/files/167918/Zoho-Password-Manager-Pro-XML-RPC-Java-Deserialization.htmlExploit, Third Party Advisory, VDB Entry
Other vulnerabilities in Manageengine Access Manager Plus
- 8.8 High severity
- 8.1 High severity
- 7.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Deserialization of Untrusted Data vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 9.8 Critical severity
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
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