CVE-2021-34141
Incomplete string comparison vulnerability in numpy (PyPI)
What is CVE-2021-34141 About?
This vulnerability in NumPy 1.9.x involves an incomplete string comparison within the numpy.core component. It allows attackers to trigger API failures by constructing specific string objects. Exploitation likely requires internal knowledge of NumPy's string handling.
Affected Software
- numpy
- >1.9.0, <1.10.0
- <1.22
Technical Details
The vulnerability stems from an incomplete string comparison in the numpy.core component of NumPy versions 1.9.x. This flaw permits attackers to craft specially designed string objects that, when processed by certain NumPy APIs, cause those APIs to fail due to the imperfect comparison logic. The specific mechanism involves manipulating string representations or properties to bypass or confuse the intended comparison, leading to unexpected behavior and API failures. The attack vector resides in providing malformed string inputs to NumPy functions that rely on this flawed comparison.
What is the Impact of CVE-2021-34141?
Successful exploitation may allow attackers to cause denial of service conditions, corrupt data, or trigger unexpected application behavior.
What is the Exploitability of CVE-2021-34141?
Exploitation complexity is likely moderate to high, as it requires specific knowledge of how NumPy's internal string comparison functions operate. Attackers would need to be able to supply crafted string objects as input to NumPy APIs. There are no explicit authentication or privilege requirements, but local access to an application utilizing the vulnerable NumPy library would likely be necessary to supply the malicious input. The exploit is dependent on the application's use of affected NumPy APIs with untrusted string inputs. Special conditions would involve identifying which APIs are susceptible to this incomplete comparison and how to craft the string to trigger the failure. The likelihood of exploitation increases if an application directly processes user-controlled strings using vulnerable NumPy logic.
What are the Known Public Exploits?
| PoC Author | Link | Commentary |
|---|---|---|
| No known exploits | ||
What are the Available Fixes for CVE-2021-34141?
Available Upgrade Options
- numpy
- >1.9.0, <1.10.0 → Upgrade to 1.10.0
- numpy
- <1.22 → Upgrade to 1.22
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Book a demoAdditional Resources
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://github.com/advisories/GHSA-fpfv-jqm9-f5jm
- https://github.com/numpy/numpy
- https://github.com/numpy/numpy/issues/18993
- https://nvd.nist.gov/vuln/detail/CVE-2021-34141
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://github.com/numpy/numpy/issues/18993
- https://github.com/pypa/advisory-database/tree/main/vulns/numpy/PYSEC-2021-855.yaml
- https://github.com/numpy/numpy/issues/18993
- https://osv.dev/vulnerability/GHSA-fpfv-jqm9-f5jm
What are Similar Vulnerabilities to CVE-2021-34141?
Similar Vulnerabilities: CVE-2021-34688 , CVE-2021-34689 , CVE-2021-34690 , CVE-2021-34691 , CVE-2021-34692
