CVE-2019-19274 : Exploit Details and Defense Strategies
Learn about CVE-2019-19274, a vulnerability in typed_ast versions 1.3.0 and 1.3.1 that allows for an out-of-bounds read, potentially crashing the Python interpreter process. Find mitigation steps and prevention measures here.
A vulnerability in typed_ast versions 1.3.0 and 1.3.1 allows for an out-of-bounds read, potentially crashing the Python interpreter process.
Understanding CVE-2019-19274
This CVE involves a specific vulnerability in typed_ast versions 1.3.0 and 1.3.1 that could lead to a denial of service attack.
What is CVE-2019-19274?
typed_ast versions 1.3.0 and 1.3.1 contain a flaw that enables an out-of-bounds read in the handle_keywordonly_args function. If exploited, an attacker could crash the Python interpreter process by making it parse Python source code without executing it.
The Impact of CVE-2019-19274
The vulnerability poses a risk to systems that parse Python code without executing it, particularly affecting web-based services. It also impacts specific Python 3.8.0-alpha prereleases.
Technical Details of CVE-2019-19274
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in typed_ast versions 1.3.0 and 1.3.1 allows for an out-of-bounds read in the handle_keywordonly_args function, potentially leading to a crash in the Python interpreter process.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Versions: 1.3.0, 1.3.1
Exploitation Mechanism
- Attackers can exploit the vulnerability by causing a Python interpreter to parse Python source code, triggering the out-of-bounds read in the handle_keywordonly_args function.
Mitigation and Prevention
Protecting systems from CVE-2019-19274 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update typed_ast to a patched version that addresses the vulnerability.
- Monitor Python interpreter processes for any unusual behavior.
Long-Term Security Practices
- Regularly update software components to mitigate potential vulnerabilities.
- Implement strict input validation to prevent malicious code execution.
Patching and Updates
- Apply patches provided by the software vendor to fix the vulnerability in typed_ast versions 1.3.0 and 1.3.1.