CVE-2023-27043

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python2.7	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Ignored end of life, was deferred [2024-08-19]
	22.04 LTS jammy	Fixed 2.7.18-13ubuntu1.2+esm3 Ubuntu Pro
	20.04 LTS focal	Fixed 2.7.18-1~20.04.4+esm3 Ubuntu Pro
	18.04 LTS bionic	Fixed 2.7.17-1~18.04ubuntu1.13+esm6 Ubuntu Pro
	16.04 LTS xenial	Fixed 2.7.12-1ubuntu0~16.04.18+esm11 Ubuntu Pro
	14.04 LTS trusty	Fixed 2.7.6-8ubuntu0.6+esm20 Ubuntu Pro
python3.10	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Ignored end of life, was deferred [2024-08-19]
	22.04 LTS jammy	Fixed 3.10.12-1~22.04.6
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.11	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Ignored end of life, was deferred [2024-08-19]
	23.04 lunar	Ignored end of life, was deferred [2024-08-19]
	22.10 kinetic	Ignored end of life, was deferred [2024-08-19]
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.12	24.10 oracular	Not affected
	24.04 LTS noble	Fixed 3.12.3-1ubuntu0.2
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.13	24.10 oracular	Not affected
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.4	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Vulnerable
python3.5	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Fixed 3.5.2-2ubuntu0~16.04.13+esm15 Ubuntu Pro
	14.04 LTS trusty	Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm3 Ubuntu Pro
python3.6	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.7	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.8	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Fixed 3.8.10-0ubuntu1~20.04.12
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
python3.9	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	23.04 lunar	Not in release
	22.10 kinetic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Vulnerable
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Notes

mdeslaur

As of 2024-08-19, the new pull requests are: https://github.com/python/cpython/pull/108250 https://github.com/python/cpython/pull/111116

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
python3.10	Upstream: 2a9273a
python3.11	Upstream: bc4a703
python3.12	Upstream: 1506824
python3.8	Upstream: 4d069d5
python3.9	Upstream: ee953f2

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-7015-1
Python vulnerabilities
16 September 2024

USN-7015-3
Python vulnerability
1 October 2024

USN-7015-4
Python vulnerability
14 October 2024