CVE-2021-30324 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-30324, a medium-severity vulnerability in Qualcomm Snapdragon products, allowing out-of-bounds write attacks. Learn about affected systems, exploit mechanisms, and mitigation steps.
Possible out of bound write due to lack of boundary check for the maximum size of buffer when sending a DCI packet to remote process in multiple Qualcomm products.
Understanding CVE-2021-30324
This CVE details a vulnerability that could allow an attacker to perform an out-of-bounds write due to a lack of boundary check when sending a DCI packet.
What is CVE-2021-30324?
The CVE-2021-30324 vulnerability exists in multiple Qualcomm products, including Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wearables, and Snapdragon Wired Infrastructure and Networking. The issue arises from not verifying the buffer size when transmitting a DCI packet to a remote process.
The Impact of CVE-2021-30324
The impact of this vulnerability is rated as medium severity with a CVSS base score of 6.7. It could potentially result in high confidentiality, integrity, and availability impacts. Attack complexity is considered low, and the attack vector is local, requiring high privileges.
Technical Details of CVE-2021-30324
This section provides more detailed technical information about the CVE.
Vulnerability Description
The vulnerability stems from a lack of boundary check for buffer size when transmitting DCI packets, which could lead to an out-of-bounds write situation.
Affected Systems and Versions
Numerous Qualcomm products are affected by this vulnerability, such as APQ8096AU, AR8031, AR8035, and a long list of other versions. All the mentioned products are susceptible to the issue.
Exploitation Mechanism
Exploiting this vulnerability requires local access to the system and high privileges. By sending a crafted DCI packet, an attacker could trigger the issue.
Mitigation and Prevention
To protect systems from CVE-2021-30324, immediate actions and long-term security practices are crucial.
Immediate Steps to Take
Immediately applying the latest security patches provided by Qualcomm is essential. Additionally, monitoring network traffic for any suspicious activities can help in detecting potential exploitation attempts.
Long-Term Security Practices
Implementing the principle of least privilege, ensuring secure coding practices, and conducting regular security assessments and audits are effective long-term strategies.
Patching and Updates
Regularly updating the firmware and software of the affected Qualcomm products to the latest versions that contain security fixes is vital.