CVE-2021-3177
python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c
Severity Score
9.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.
Python versiones 3.x hasta 3.9.1, presenta un desbordamiento de búfer en la función PyCArg_repr en el archivo _ctypes/callproc.c, que puede conllevar a una ejecución de código remota en determinadas aplicaciones de Python que aceptan números de punto flotante como entrada no confiable, como es demostrado por un argumento 1e300 para c_double.from_param. Esto ocurre porque sprintf es usado de manera no segura
A flaw was found in python. A stack-based buffer overflow was discovered in the ctypes module provided within Python. Applications that use ctypes without carefully validating the input passed to it may be vulnerable to this flaw, which would allow an attacker to overflow a buffer on the stack and crash the application. The highest threat from this vulnerability is to system availability.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-01-19 CVE Reserved
- 2021-01-19 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2024-09-02 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC
References (30)
| URL | Tag | Source |
|---|---|---|
| https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E | Mailing List | |
| https://lists.debian.org/debian-lts-announce/2021/04/msg00005.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html | Mailing List |
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| https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html | Mailing List |
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| https://news.ycombinator.com/item?id=26185005 | Third Party Advisory | |
| https://security.netapp.com/advisory/ntap-20210226-0003 | Third Party Advisory |
|
| URL | Date | SRC |
|---|---|---|
| https://bugs.python.org/issue42938 | 2024-08-03 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.6.0 <= 3.6.12 Search vendor "Python" for product "Python" and version " >= 3.6.0 <= 3.6.12" | - |
Affected
| ||||||
| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.7.0 <= 3.7.9 Search vendor "Python" for product "Python" and version " >= 3.7.0 <= 3.7.9" | - |
Affected
| ||||||
| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.8.0 <= 3.8.7 Search vendor "Python" for product "Python" and version " >= 3.8.0 <= 3.8.7" | - |
Affected
| ||||||
| Python Search vendor "Python" | Python Search vendor "Python" for product "Python" | >= 3.9.0 <= 3.9.1 Search vendor "Python" for product "Python" and version " >= 3.9.0 <= 3.9.1" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 32 Search vendor "Fedoraproject" for product "Fedora" and version "32" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 33 Search vendor "Fedoraproject" for product "Fedora" and version "33" | - |
Affected
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| Netapp Search vendor "Netapp" | Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager" | - | vmware_vsphere |
Affected
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| Netapp Search vendor "Netapp" | Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager" | - | windows |
Affected
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| Netapp Search vendor "Netapp" | Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility" | - | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Communications Cloud Native Core Network Function Cloud Native Environment Search vendor "Oracle" for product "Communications Cloud Native Core Network Function Cloud Native Environment" | 22.2.0 Search vendor "Oracle" for product "Communications Cloud Native Core Network Function Cloud Native Environment" and version "22.2.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Communications Offline Mediation Controller Search vendor "Oracle" for product "Communications Offline Mediation Controller" | 12.0.0.3.0 Search vendor "Oracle" for product "Communications Offline Mediation Controller" and version "12.0.0.3.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Communications Pricing Design Center Search vendor "Oracle" for product "Communications Pricing Design Center" | 12.0.0.3.0 Search vendor "Oracle" for product "Communications Pricing Design Center" and version "12.0.0.3.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Enterprise Manager Ops Center Search vendor "Oracle" for product "Enterprise Manager Ops Center" | 12.4.0.0 Search vendor "Oracle" for product "Enterprise Manager Ops Center" and version "12.4.0.0" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Zfs Storage Appliance Kit Search vendor "Oracle" for product "Zfs Storage Appliance Kit" | 8.8 Search vendor "Oracle" for product "Zfs Storage Appliance Kit" and version "8.8" | - |
Affected
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