ServiceNow Improper Input Validation
CVE-2024-4879 is a critical-severity improper validation of specified type of input vulnerability in Now Platform from ServiceNow, 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 versions Utah Patch 10 Hot Fix 3, Utah Patch 10a Hot Fix 2, Vancouver Patch 6 Hot Fix 2 as the first without the flaw, so updating Now Platform to one of those releases or later removes the exposure. CISA added it to the Known Exploited Vulnerabilities catalogue on July 29, 2024, which means attacks have been observed in the wild.
Attackers are already exploiting this vulnerability, according to CISA.
What to do
- Update Now Platform to Utah Patch 10 Hot Fix 3 or Utah Patch 10a Hot Fix 2 or Vancouver Patch 6 Hot Fix 2 or Vancouver Patch 7 Hot Fix 3b, whichever matches your release line, or a later version.
- Update servicenow to utah_patch_10_hot_fix_3 or utah_patch_10a_hot_fix_2 or vancouver_patch_6_hot_fix_2 or vancouver_patch_7_hot_fix_3b, whichever matches your release line, or a later version.
- CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Read the advisory on support.servicenow.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 |
|---|---|---|---|
| ServiceNow | Now Platform | before Utah Patch 10 Hot Fix 3; before Utah Patch 10a Hot Fix 2; before Vancouver Patch 6 Hot Fix 2; before Vancouver Patch 7 Hot Fix 3b; before Vancouver Patch 8 Hot Fix 4; before Vancouver Patch 9; before Vancouver Patch 10; before Washington DC Patch 1 Hot Fix 2b; and 3 more ranges | Utah Patch 10 Hot Fix 3, Utah Patch 10a Hot Fix 2, Vancouver Patch 6 Hot Fix 2, Vancouver Patch 7 Hot Fix 3b, Vancouver Patch 8 Hot Fix 4, Vancouver Patch 9 |
| Servicenow | servicenow | before utah_patch_10_hot_fix_3; before utah_patch_10a_hot_fix_2; before vancouver_patch_6_hot_fix_2; before vancouver_patch_7_hot_fix_3b; before vancouver_patch_8_hot_fix_4; before vancouver_patch_9; before vancouver_patch_10; before washington_dc_patch_1_hot_fix_2b; and 3 more ranges | utah_patch_10_hot_fix_3, utah_patch_10a_hot_fix_2, vancouver_patch_6_hot_fix_2, vancouver_patch_7_hot_fix_3b, vancouver_patch_8_hot_fix_4, vancouver_patch_9 |
Version data comes from the organisation that assigned the CVE. 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 4.0 | 9.3 | Critical | CNA (servicenow.com) |
| CVSS 3.1 | 9.8 | Critical | CNA (servicenow.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
ServiceNow has addressed an input validation vulnerability that was identified in Vancouver and Washington DC Now Platform releases. This vulnerability could enable an unauthenticated user to remotely execute code within the context of the Now Platform. ServiceNow applied an update to hosted instances, and ServiceNow released the update to our partners and self-hosted customers. Listed below are the patches and hot fixes that address the vulnerability. If you have not done so already, we recommend applying security patches relevant to your instance as soon as possible.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
More Improper Validation of Specified Type of Input vulnerabilities (CWE-1287)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
- Added to CISA's Known Exploited Vulnerabilities catalogue.
- Deadline for US federal agencies to remediate, set by CISA.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- darkreading.com/cloud-security/patchnow-servicenow-critical-rce-bugs-active-exploitPress/Media Coverage, Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4879US Government Resource
Other references
- support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB1644293Permissions Required
Other vulnerabilities in Now Platform
- 8.2 High severity
- 7.5 High severity
- 10.0 Critical severity
- 9.8 Critical severity
Recent Improper Validation of Specified Type of Input vulnerabilities
- 9.8 Critical severity
- 8.8 High severity
- 9.0 Critical severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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