Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial…

Description

Multiple race conditions in smtpd.py in the smtpd module in Python 2.6, 2.7, 3.1, and 3.2 alpha allow remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, or the getpeername function having an ENOTCONN error, a related issue to CVE-2010-3492.

Scores

EPSS (exploitation in 30 days)

2.8% · top 13% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• n/a
• CWE-362 (opens in a new tab)All about CWE-362 and its CVEs

Affected products

• n/a

  • affected n/a

References (24)

• http://svn.python.org/view/python/branches/py3k/Lib/smtpd.py?r1=84289&r2=84288&pathrev=84289 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [oss-security] 20100910 Re: CVE Request -- Python -- accept() implementation in async core is broken => more subcases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=632200 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 43068 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• https://bugs.launchpad.net/zodb/+bug/135108 (opens in a new tab)x_refsource_MISCx_transferred
• ADV-2011-0212 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 51040 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• oval:org.mitre.oval:def:12210 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 50858 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• MDVSA-2010:216 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• http://bugs.python.org/issue9129 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 44533 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• SUSE-SR:2011:002 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• [oss-security] 20100924 Re: CVE Request -- Python -- accept() implementation in async core is broken => more subcases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• USN-1596-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• [oss-security] 20100922 Re: CVE Request -- Python -- accept() implementation in async core is broken => more subcases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://bugs.python.org/issue6706 (opens in a new tab)x_refsource_MISCx_transferred
• [oss-security] 20100909 CVE Request -- Python -- accept() implementation in async core is broken => more subcases (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• USN-1613-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• SUSE-SR:2010:024 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://svn.python.org/view?view=rev&revision=84289 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 51024 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-1613-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• MDVSA-2010:215 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2010-3493](https://trackcve.app/badge/CVE-2010-3493.svg)](https://trackcve.app/cve/CVE-2010-3493)

Record last updated 7 Aug 2024, 03:11 UTC.