Saturday, December 18, 2021

Ubuntu Security Notice USN-5201-1

Ubuntu Security Notice USN-5201-1
December 17, 2021

python3.8, python3.9 vulnerabilities

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS


Python could be made to crash if it receives specially crafted input
from a malicious server.

Software Description:
- python3.9: Interactive high-level object-oriented language (version 3.9)
- python3.8: An interactive high-level object-oriented language


It was discovered that the Python urllib http client could enter into an
infinite loop when incorrectly handling certain server responses (100
Continue response). Specially crafted traffic from a malicious HTTP
server could cause a denial of service (Dos) condition for a client.

Update instructions:

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

Ubuntu 21.04:
libpython3.9-stdlib 3.9.5-3ubuntu0~21.04.1
python3.9 3.9.5-3ubuntu0~21.04.1
python3.9-minimal 3.9.5-3ubuntu0~21.04.1

Ubuntu 20.04 LTS:
libpython3.8-stdlib 3.8.10-0ubuntu1~20.04.2
libpython3.9-stdlib 3.9.5-3ubuntu0~20.04.1
python3.8 3.8.10-0ubuntu1~20.04.2
python3.8-minimal 3.8.10-0ubuntu1~20.04.2
python3.9 3.9.5-3ubuntu0~20.04.1
python3.9-minimal 3.9.5-3ubuntu0~20.04.1

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


Package Information:

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