ByteOS Network

CVE Vulnerability Details :

CVE-2021-3177

PUBLISHED

More Info Official Page

Assigner-mitre

Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca

Published At-19 Jan, 2021 | 00:00

Updated At-18 Dec, 2025 | 15:03

▼CVE Numbering Authority (CNA)

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.

Affected Products

Vendor

n/a

Product

n/a

Versions

Affected

Problem Types

Type	CWE ID	Description
text	N/A	n/a

Type: text

CWE ID: N/A

Description: n/a

References

Hyperlink	Resource
https://bugs.python.org/issue42938	N/A
https://github.com/python/cpython/pull/24239	N/A
https://python-security.readthedocs.io/vuln/ctypes-buffer-overflow-pycarg_repr.html	N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MGSV6BJQLRQ6RKVUXK7JGU7TP4QFGQXC/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQPARTLNSFQVMMQHPNBFOCOZOO3TMQNA/	vendor-advisory
https://security.gentoo.org/glsa/202101-18	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7GZV74KM72O2PEJN2C4XP3V5Q5MZUOO/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCFZMVRQUKCBQIG5F2CBVADK63NFSE4A/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRHOCQYX3QLDGDQGTWQAUUT2GGIZCZUO/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXSMBHES3ANXXS2RSO5G6Q24BR4B2PWK/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V6XJAULOS5JVB2L67NCKKMJ5NTKZJBSD/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YDTZVGSXQ7HR7OCGSUHTRNTMBG43OMKU/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4KSYYWMGAKOA2JVCQA422OINT6CKQ7O/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPE7SMXYUIWPOIZV4DQYXODRXMFX3C5E/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCQTCSP6SCVIYNIRUJC5X7YBVUHPLSC4/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NODWHDIFBQE5RU5PUWUVE47JOT5VCMJ2/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MP572OLHMS7MZO4KUPSCIMSZIA5IZZ62/	vendor-advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E	mailing-list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FONHJIOZOFD7CD35KZL6SVBUTMBPGZGA/	vendor-advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00005.html	mailing-list
https://www.oracle.com//security-alerts/cpujul2021.html	N/A
https://news.ycombinator.com/item?id=26185005	N/A
https://security.netapp.com/advisory/ntap-20210226-0003/	N/A
https://www.oracle.com/security-alerts/cpuoct2021.html	N/A
https://www.oracle.com/security-alerts/cpujan2022.html	N/A
https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html	mailing-list
https://www.oracle.com/security-alerts/cpujul2022.html	N/A
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html	mailing-list

Hyperlink: https://bugs.python.org/issue42938

Resource: N/A

Hyperlink: https://github.com/python/cpython/pull/24239

Resource: N/A

Hyperlink: https://python-security.readthedocs.io/vuln/ctypes-buffer-overflow-pycarg_repr.html

Resource: N/A

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MGSV6BJQLRQ6RKVUXK7JGU7TP4QFGQXC/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQPARTLNSFQVMMQHPNBFOCOZOO3TMQNA/

Resource:

vendor-advisory

Hyperlink: https://security.gentoo.org/glsa/202101-18

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7GZV74KM72O2PEJN2C4XP3V5Q5MZUOO/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCFZMVRQUKCBQIG5F2CBVADK63NFSE4A/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRHOCQYX3QLDGDQGTWQAUUT2GGIZCZUO/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXSMBHES3ANXXS2RSO5G6Q24BR4B2PWK/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V6XJAULOS5JVB2L67NCKKMJ5NTKZJBSD/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YDTZVGSXQ7HR7OCGSUHTRNTMBG43OMKU/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4KSYYWMGAKOA2JVCQA422OINT6CKQ7O/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPE7SMXYUIWPOIZV4DQYXODRXMFX3C5E/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCQTCSP6SCVIYNIRUJC5X7YBVUHPLSC4/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NODWHDIFBQE5RU5PUWUVE47JOT5VCMJ2/

Resource:

vendor-advisory

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MP572OLHMS7MZO4KUPSCIMSZIA5IZZ62/

Resource:

vendor-advisory

Hyperlink: https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E

Resource:

mailing-list

Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FONHJIOZOFD7CD35KZL6SVBUTMBPGZGA/

Resource:

vendor-advisory

Hyperlink: https://lists.debian.org/debian-lts-announce/2021/04/msg00005.html

Resource:

mailing-list

Hyperlink: https://www.oracle.com//security-alerts/cpujul2021.html

Resource: N/A

Hyperlink: https://news.ycombinator.com/item?id=26185005

Resource: N/A

Hyperlink: https://security.netapp.com/advisory/ntap-20210226-0003/

Resource: N/A

Hyperlink: https://www.oracle.com/security-alerts/cpuoct2021.html

Resource: N/A

Hyperlink: https://www.oracle.com/security-alerts/cpujan2022.html

Resource: N/A

Hyperlink: https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html

Resource:

mailing-list

Hyperlink: https://www.oracle.com/security-alerts/cpujul2022.html

Resource: N/A

Hyperlink: https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html

Resource:

mailing-list

▼Authorized Data Publishers (ADP)

1. CVE Program Container

References

Hyperlink	Resource
https://bugs.python.org/issue42938	x_transferred
https://github.com/python/cpython/pull/24239	x_transferred
https://python-security.readthedocs.io/vuln/ctypes-buffer-overflow-pycarg_repr.html	x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MGSV6BJQLRQ6RKVUXK7JGU7TP4QFGQXC/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NQPARTLNSFQVMMQHPNBFOCOZOO3TMQNA/	vendor-advisory x_transferred
https://security.gentoo.org/glsa/202101-18	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7GZV74KM72O2PEJN2C4XP3V5Q5MZUOO/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCFZMVRQUKCBQIG5F2CBVADK63NFSE4A/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRHOCQYX3QLDGDQGTWQAUUT2GGIZCZUO/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXSMBHES3ANXXS2RSO5G6Q24BR4B2PWK/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V6XJAULOS5JVB2L67NCKKMJ5NTKZJBSD/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YDTZVGSXQ7HR7OCGSUHTRNTMBG43OMKU/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4KSYYWMGAKOA2JVCQA422OINT6CKQ7O/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPE7SMXYUIWPOIZV4DQYXODRXMFX3C5E/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCQTCSP6SCVIYNIRUJC5X7YBVUHPLSC4/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NODWHDIFBQE5RU5PUWUVE47JOT5VCMJ2/	vendor-advisory x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MP572OLHMS7MZO4KUPSCIMSZIA5IZZ62/	vendor-advisory x_transferred
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E	mailing-list x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FONHJIOZOFD7CD35KZL6SVBUTMBPGZGA/	vendor-advisory x_transferred
https://lists.debian.org/debian-lts-announce/2021/04/msg00005.html	mailing-list x_transferred
https://www.oracle.com//security-alerts/cpujul2021.html	x_transferred
https://news.ycombinator.com/item?id=26185005	x_transferred
https://security.netapp.com/advisory/ntap-20210226-0003/	x_transferred
https://www.oracle.com/security-alerts/cpuoct2021.html	x_transferred
https://www.oracle.com/security-alerts/cpujan2022.html	x_transferred
https://lists.debian.org/debian-lts-announce/2022/02/msg00013.html	mailing-list x_transferred
https://www.oracle.com/security-alerts/cpujul2022.html	x_transferred
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html	mailing-list x_transferred