Full Report
An insufficient validation input flaw, one of 11 patched in an update this week, could allow for arbitrary code execution and is under active attack.
Analysis Summary
As a vulnerability research specialist, here is the summary of the pertinent vulnerability information extracted from the provided context.
# Vulnerability: Insufficient Input Validation in Chrome Intents Leading to Potential Arbitrary Code Execution
## CVE Details
- CVE ID: CVE-2022-2856
- CVSS Score: High (Specific numeric score not provided, but classified as High severity)
- CWE: Insufficient Validation of Untrusted Input (Contextually related to CWE-20: Improper Input Validation)
## Affected Systems
- Products: Google Chrome (Stable Channel updates)
- Versions: Specific vulnerable versions are not detailed, but required immediate patching via the latest stable channel update.
- Configurations: Affects the Chrome browser's handling of Android Intents (deep linking feature).
## Vulnerability Description
The vulnerability, tracked as CVE-2022-2856, stems from "insufficient validation of untrusted input in Intents." Intents are used in Chrome on Android devices for deep linking into applications. The flaw allows an attacker to craft malicious input that is not properly sanitized or validated by the system, potentially leading to **Arbitrary Code Execution (ACE)**.
## Exploitation
- Status: **Under active attack** (Reported as an actively exploited zero-day).
- Complexity: Not explicitly stated, but the potential for ACE suggests a low-to-medium complexity once crafted input is utilized.
- Attack Vector: Likely Network/Remote, given it involves browser input handling related to Intents.
## Impact
- Confidentiality: High (Implied by ACE potential)
- Integrity: High (Implied by ACE potential)
- Availability: High (Implied by ACE potential)
## Remediation
### Patches
- A fix was included in the **Chrome stable channel update released Wednesday** (date not specified, but related to the August 2022 reporting).
### Workarounds
- No specific workarounds were detailed in the context, as the fix was immediately available and exploitation was active. Defense involved patching before details were widely released. (Note: Given the nature of the flaw involving Android Intents, restricting or auditing the handling of external links could be a temporary step if patching is delayed, though patching is strongly advised.)
## Detection
- Detection strategies are not explicitly provided, as Google withheld details to prevent further exploitation.
- **Mitigation Strategy:** Immediate application of the vendor-supplied stable channel patch is the primary detection/mitigation strategy due to active exploitation.
## References
- Vendor Advisory: hxxps://chromereleases.googleblog.com/2022/08/stable-channel-update-for-desktop_16.html
- Related CVE (Critical UAF): CVE-2022-2852 (FedCM issue)
- MITRE CWE Context: hxxps://cwe.mitre.org/data/definitions/20.html