CVE-2019-11922 : Vulnerability Insights and Analysis
Discover the impact of CVE-2019-11922 on Zstandard prior to version 1.3.8. Learn about the out-of-bounds write vulnerability and how to mitigate the risks effectively.
Zstandard prior to version 1.3.8 was found to have a race condition in the one-pass compression functions, potentially allowing attackers to write bytes out of bounds. This CVE affects Zstandard version 1.3.8 and custom versions less than 1.3.8.
Understanding CVE-2019-11922
Zstandard, developed by Facebook, had a vulnerability that could lead to out-of-bounds write due to a race condition in its compression functions.
What is CVE-2019-11922?
Prior to version 1.3.8 of Zstandard, a race condition in the one-pass compression functions could enable attackers to write bytes beyond allowed boundaries if an output buffer smaller than the recommended size was used.
The Impact of CVE-2019-11922
This vulnerability could potentially be exploited by malicious actors to overwrite memory beyond the intended limits, leading to a security breach or system compromise.
Technical Details of CVE-2019-11922
Zstandard's vulnerability in version 1.3.8 and custom versions less than 1.3.8 poses a risk of out-of-bounds write due to a race condition in compression functions.
Vulnerability Description
The race condition within Zstandard's one-pass compression functions could allow attackers to write bytes beyond the allowed boundaries when using an undersized output buffer.
Affected Systems and Versions
- Product: Zstandard
- Vendor: Facebook
- Affected Versions: 1.3.8 and custom versions less than 1.3.8
Exploitation Mechanism
Attackers could exploit this vulnerability by utilizing an output buffer smaller than the recommended size, enabling them to write bytes out of bounds.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2019-11922.
Immediate Steps to Take
- Update Zstandard to version 1.3.8 or newer to patch the vulnerability.
- Monitor for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software and systems to ensure the latest security patches are applied.
- Conduct security audits and assessments to identify and address vulnerabilities proactively.
Patching and Updates
- Apply patches provided by Facebook for Zstandard to address the race condition vulnerability.