Ubuntu Security Notice 6891-1 - It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS.
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Ubuntu Security Notice 4754-3 - USN-4754-1 fixed vulnerabilities in Python. This update provides the corresponding updates for Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. In the case of Python 2.7 for 20.04 ESM, these additional fixes are included: It was discovered that Python allowed remote attackers to cause a denial of service via a ZIP bomb. It was discovered that Python had potentially misleading information about whether sorting occurs. This fix updates the documentation about it. Various other issues were also addressed.
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Ubuntu Security Notice 4428-1 - It was discovered that Python documentation had a misleading information. A security issue could be possibly caused by wrong assumptions of this information. This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that Python incorrectly handled certain TAR archives. An attacker could possibly use this issue to cause a denial of service. Various other issues were also addressed.
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