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medium 4.3

CVE-2010-3493 json

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…

published 16y ago modified 4mo ago also EUVD-2010-3491

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

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.

Patch / fix

  • python RHEL 6 2.6.6-20.el6
  • tkinter RHEL 6 2.6.6-20.el6
  • python-libs RHEL 6 2.6.6-20.el6
  • python-test RHEL 6 2.6.6-20.el6
  • python-tools RHEL 6 2.6.6-20.el6
  • python RHEL 5 2.4.3-44.el5
  • tkinter RHEL 5 2.4.3-44.el5
  • python-libs RHEL 5 2.4.3-44.el5

red hat advisories RHSA-2011:0554RHSA-2011:0492RHSA-2011:0491

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-3493 updated cvss 5.0

Python: SMTP proxy RFC 2821 module DoS (uncaught exception) (Issue #9129)

  • Red Hat Enterprise Linux (v. 5 server) python 2.4.3-44.el5, tkinter 2.4.3-44.el5, python-libs 2.4.3-44.el5, python-tools 2.4.3-44.el5
    fixed: vendor fix RHSA-2011:0492
  • Red Hat Enterprise Linux AS version 4 python 2.3.4-14.10.el4, tkinter 2.3.4-14.10.el4, python-tools 2.3.4-14.10.el4
    fixed: vendor fix RHSA-2011:0491
  • Red Hat Enterprise Linux Desktop (v. 5 client) python 2.4.3-44.el5, tkinter 2.4.3-44.el5, python-libs 2.4.3-44.el5, python-tools 2.4.3-44.el5
    fixed: vendor fix RHSA-2011:0492
  • Red Hat Enterprise Linux Desktop (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6
    fixed: vendor fix RHSA-2011:0554
  • Red Hat Enterprise Linux Desktop version 4 python 2.3.4-14.10.el4, tkinter 2.3.4-14.10.el4, python-tools 2.3.4-14.10.el4
    fixed: vendor fix RHSA-2011:0491
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) python 2.4.3-44.el5, tkinter 2.4.3-44.el5, python-libs 2.4.3-44.el5, python-tools 2.4.3-44.el5
    fixed: vendor fix RHSA-2011:0492
  • Red Hat Enterprise Linux ES version 4 python 2.3.4-14.10.el4, tkinter 2.3.4-14.10.el4, python-tools 2.3.4-14.10.el4
    fixed: vendor fix RHSA-2011:0491
  • Red Hat Enterprise Linux HPC Node (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux Server (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux Server Optional (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux Workstation (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) python 2.6.6-20.el6, tkinter 2.6.6-20.el6, python-libs 2.6.6-20.el6, python-test 2.6.6-20.el6, python-tools 2.6.6-20.el6
    fixed: vendor fix RHSA-2011:0554
show 1 more
  • Red Hat Enterprise Linux WS version 4 python 2.3.4-14.10.el4, tkinter 2.3.4-14.10.el4, python-tools 2.3.4-14.10.el4
    fixed: vendor fix RHSA-2011:0491

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.80% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.