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Advisory severityMedium6.5Vendor: LowRed Hat Linux

Medium [CVE-2021-3737] flaw was found in python

This medium-severity Red Hat Linux advisory covers CVE-2021-3737 affecting Red Hat Enterprise Linux 8, Red Hat Software Collections for Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 6.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2021-3737 Source published Source updated

VulniPulse record published

CVE-2021-3737
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time.

The highest threat from this vulnerability is to system availability. Given the flaw is in the client side and it requires automatically connecting to a compromised but trusted server or manually connecting to a malicious server, the Impact of this flaw has been set to Low.

It requires indeed unlikely circumstances to be exploited and when it is it is enough to stop the client or restart it. This issue did not affect the versions of rh-python38-python as shipped with Red Hat Software Collections 3 as they already contain the patch.

Red Hat severity: Low — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-835.

Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Software Collections for Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Red Hat fixing advisory: RHSA-2021:4160, RHSA-2022:1764, RHSA-2022:1821, RHSA-2022:1986, RHSA-2022:1663.

Affected products named by the advisory: Red Hat package: python3.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

Fixed versions
  • python39:3.9-8050020210811100211.d428a79b
  • python39-devel:3.9-8050020210811100211.d428a79b
  • python38:3.8-8060020220120164031.5294be16
  • python38-devel:3.8-8060020220120164031.5294be16
  • python27:2.7-8060020220210185952.8cdc2268
  • python3-0:3.6.8-45.el8
  • python27-python-0:2.7.18-4.el7
  • RHSA-2021:4160
  • RHSA-2022:1764
  • RHSA-2022:1821
  • RHSA-2022:1986
  • RHSA-2022:1663

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

Mitigation

Upgrade to a fixed release: python39:3.9-8050020210811100211.d428a79b, python39-devel:3.9-8050020210811100211.d428a79b, python38:3.8-8060020220120164031.5294be16, python38-devel:3.8-8060020220120164031.5294be16, python27:2.7-8060020220210185952.8cdc2268, python3-0:3.6.8-45.el8. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 17 hours ago·verify at source

Discussion(0)

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