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Ubuntu Security Notice USN-7015-3

Ubuntu Security Notice 7015-3 - USN-7015-1 fixed several vulnerabilities in Python. This update provides the corresponding updates for CVE-2023-27043 for python2.7 in Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS, and for python3.5 in Ubuntu 16.04 LTS. It was discovered that the Python email module incorrectly parsed email addresses that contain special characters. A remote attacker could possibly use this issue to bypass certain protection mechanisms. It was discovered that Python allowed excessive backtracking while parsing certain tarfile headers. A remote attacker could possibly use this issue to cause Python to consume resources, leading to a denial of service. It was discovered that the Python email module incorrectly quoted newlines for email headers. A remote attacker could possibly use this issue to perform header injection. It was discovered that the Python http.cookies module incorrectly handled parsing cookies that contained backslashes for quoted characters. A remote attacker could possibly use this issue to cause Python to consume resources, leading to a denial of service. It was discovered that the Python zipfile module incorrectly handled certain malformed zip files. A remote attacker could possibly use this issue to cause Python to stop responding, resulting in a denial of service.

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Ubuntu Security Notice USN-7015-3
October 01, 2024

python2.7, python3.5 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 22.04 LTS
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary:

Python could be made to bypass some restrictions if it received specially
crafted input.

Software Description:

  • python2.7: An interactive high-level object-oriented language
  • python3.5: An interactive high-level object-oriented language

Details:

USN-7015-1 fixed several vulnerabilities in Python. This update provides
the corresponding updates for CVE-2023-27043 for python2.7 in Ubuntu 16.04
LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS, and for
python3.5 in Ubuntu 16.04 LTS.

Original advisory details:

It was discovered that the Python email module incorrectly parsed email
addresses that contain special characters. A remote attacker could
possibly use this issue to bypass certain protection mechanisms.
(CVE-2023-27043)

It was discovered that Python allowed excessive backtracking while parsing
certain tarfile headers. A remote attacker could possibly use this issue
to cause Python to consume resources, leading to a denial of service.
(CVE-2024-6232)

It was discovered that the Python email module incorrectly quoted newlines
for email headers. A remote attacker could possibly use this issue to
perform header injection. (CVE-2024-6923)

It was discovered that the Python http.cookies module incorrectly handled
parsing cookies that contained backslashes for quoted characters. A remote
attacker could possibly use this issue to cause Python to consume
resources, leading to a denial of service. (CVE-2024-7592)

It was discovered that the Python zipfile module incorrectly handled
certain malformed zip files. A remote attacker could possibly use this
issue to cause Python to stop responding, resulting in a denial of
service. (CVE-2024-8088)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
python2.7 2.7.18-13ubuntu1.2+esm3
Available with Ubuntu Pro
python2.7-minimal 2.7.18-13ubuntu1.2+esm3
Available with Ubuntu Pro

Ubuntu 20.04 LTS
python2.7 2.7.18-1~20.04.4+esm3
Available with Ubuntu Pro
python2.7-minimal 2.7.18-1~20.04.4+esm3
Available with Ubuntu Pro

Ubuntu 18.04 LTS
python2.7 2.7.17-1~18.04ubuntu1.13+esm6
Available with Ubuntu Pro
python2.7-minimal 2.7.17-1~18.04ubuntu1.13+esm6
Available with Ubuntu Pro

Ubuntu 16.04 LTS
python2.7 2.7.12-1ubuntu0~16.04.18+esm11
Available with Ubuntu Pro
python2.7-minimal 2.7.12-1ubuntu0~16.04.18+esm11
Available with Ubuntu Pro
python3.5 3.5.2-2ubuntu0~16.04.13+esm15
Available with Ubuntu Pro
python3.5-minimal 3.5.2-2ubuntu0~16.04.13+esm15
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7015-3
https://ubuntu.com/security/notices/USN-7015-2
https://ubuntu.com/security/notices/USN-7015-1
CVE-2023-27043

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Ubuntu Security Notice 7015-1 - It was discovered that the Python email module incorrectly parsed email addresses that contain special characters. A remote attacker could possibly use this issue to bypass certain protection mechanisms. It was discovered that Python allowed excessive backtracking while parsing certain tarfile headers. A remote attacker could possibly use this issue to cause Python to consume resources, leading to a denial of service.

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The e-mail module of Python 0 - 2.7.18, 3.x - 3.11 incorrectly parses e-mail addresses which contain a special character. This vulnerability allows attackers to send messages from e-ail addresses that would otherwise be rejected.

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