USN-4754-2
python2.7 regression
USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177 introduced a regression in Python 2.7. This update reverts the security fix pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)
What each source reports
OSVNo score
python2.7 regression
USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177 introduced a regression in Python 2.7. This update reverts the security fix pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)
- Record
USN-4754-2- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
python2.7Ubuntu:Pro:14.04:LTS | before 2.7.6-8ubuntu0.6+esm9, plus listed versions 2.7.5-8ubuntu32.7.5-8ubuntu42.7.6-22.7.6-2ubuntu12.7.6-3 Show 16 moreShow less2.7.6-3ubuntu12.7.6-42.7.6-4ubuntu12.7.6-52.7.6-72.7.6-82.7.6-8ubuntu0.22.7.6-8ubuntu0.32.7.6-8ubuntu0.42.7.6-8ubuntu0.52.7.6-8ubuntu0.6+esm22.7.6-8ubuntu0.6+esm32.7.6-8ubuntu0.6+esm52.7.6-8ubuntu0.6+esm62.7.6-8ubuntu0.6+esm72.7.6-8ubuntu0.6+esm8 | 2.7.6-8ubuntu0.6+esm9 |
python2.7Ubuntu:16.04:LTS | before 2.7.12-1ubuntu0~16.04.16, plus listed versions 2.7.10-4ubuntu12.7.10-4ubuntu22.7.11-22.7.11-32.7.11-4 Show 14 moreShow less2.7.11-62.7.11-72.7.11-7ubuntu12.7.12-1~16.042.7.12-1ubuntu0~16.04.12.7.12-1ubuntu0~16.04.22.7.12-1ubuntu0~16.04.32.7.12-1ubuntu0~16.04.42.7.12-1ubuntu0~16.04.82.7.12-1ubuntu0~16.04.92.7.12-1ubuntu0~16.04.112.7.12-1ubuntu0~16.04.122.7.12-1ubuntu0~16.04.132.7.12-1ubuntu0~16.04.14 | 2.7.12-1ubuntu0~16.04.16 |
python2.7Ubuntu:18.04:LTS | before 2.7.17-1~18.04ubuntu1.5, plus listed versions 2.7.14-2ubuntu22.7.14-42.7.14-62.7.14-72.7.14-8 Show 10 moreShow less2.7.15~rc1-12.7.15~rc1-1ubuntu0.12.7.15-4ubuntu4~18.042.7.15-4ubuntu4~18.04.12.7.15-4ubuntu4~18.04.22.7.17-1~18.042.7.17-1~18.04ubuntu12.7.17-1~18.04ubuntu1.12.7.17-1~18.04ubuntu1.22.7.17-1~18.04ubuntu1.3 | 2.7.17-1~18.04ubuntu1.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
USN-4754-2 is a vulnerability with no CVSS score yet in python2.7, published February 25, 2021. No source lists public exploit code. Fixed in python2.7 2.7.6-8ubuntu0.6+esm9.