CVE-2010-3493
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…
- 4.3MediumCVSS base score
- 2.8%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 25 days later
· 25 days later
Published
- 14 years later
· 14 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
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)
- EUVD EUVD-2010-3491 (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
[](https://cveledger.app/cve/CVE-2010-3493)Record last updated .