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

python2.7, python3.5 vulnerability
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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