Plattform
other
Komponente
zephyr
Behoben in
unspecified
CVE-2021-3510 describes a vulnerability in the Zephyr JSON decoder, specifically an incorrect handling of array-of-array structures. This flaw allows for an Attempt to Access Child of a Non-structure Pointer (CWE-588), potentially leading to system crashes or, in more severe scenarios, arbitrary code execution. The vulnerability impacts Zephyr versions greater than 1.14.0 and 2.5.0, and a fix is currently unspecified.
The core of the vulnerability lies in the JSON decoder's inability to correctly parse array-of-array structures. An attacker could craft a malicious JSON payload designed to exploit this flaw. Successfully exploiting this vulnerability could result in a denial-of-service (DoS) condition, causing the Zephyr RTOS system to crash. While the description doesn't explicitly state code execution, the potential for memory corruption raises concerns about the possibility of an attacker gaining control of the system by injecting malicious code through the crafted JSON input. The impact is particularly concerning in embedded systems and IoT devices where Zephyr is commonly deployed, as these devices often have limited security controls and may be difficult to patch.
CVE-2021-3510 was publicly disclosed on October 5, 2021. The vulnerability is documented on the Zephyr GitHub security advisories page. There is no indication of active exploitation or inclusion in the CISA KEV catalog at the time of writing. Public proof-of-concept exploits are not widely available, but the nature of the vulnerability suggests that development of such exploits is possible.
Organizations and developers utilizing Zephyr RTOS in embedded systems, IoT devices, and real-time applications are at risk. Systems relying on external JSON data sources, particularly those with limited input validation, are especially vulnerable. Projects using older, unsupported versions of Zephyr are also at increased risk.
disclosure
Exploit-Status
EPSS
0.33% (56% Perzentil)
CVSS-Vektor
Due to the lack of a specified fixed version, immediate mitigation strategies are crucial. The primary recommendation is to avoid processing untrusted JSON data within the Zephyr RTOS environment. Input validation and sanitization are essential to prevent malicious payloads from reaching the JSON decoder. Consider implementing stricter JSON schema validation to ensure that only expected data structures are processed. While a direct patch is unavailable, monitoring Zephyr security advisories and applying updates as soon as they are released is paramount. For systems where JSON parsing is unavoidable, explore alternative parsing libraries or implementations that are known to be more robust against this type of vulnerability. Regularly review and update Zephyr configurations to minimize the attack surface.
Aktualisieren Sie auf eine Zephyr-Version, die die Schwachstelle behebt. Weitere Details zur Behebung finden Sie im Sicherheits-Advisory auf GitHub.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2021-3510 is a HIGH severity vulnerability affecting Zephyr versions greater than 1.14.0 and 2.5.0. It involves incorrect JSON array decoding, potentially leading to crashes or code execution.
If you are using Zephyr versions greater than 1.14.0 or 2.5.0 and process JSON data, you are potentially affected. Carefully review your input validation practices.
A specific fix version is currently unspecified. Mitigate by rigorously validating JSON input and implementing robust error handling. Monitor Zephyr's security advisories for updates.
There is currently no public evidence of active exploitation, but the vulnerability's nature suggests it could be targeted.
Refer to the Zephyr security advisory on GitHub: https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-289f-7mw3-2qf4
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