QID 198609

Date Published: 2021-12-20

QID 198609: Ubuntu Security Notification for Python Vulnerabilities (USN-5199-1)

The python urllib http client could enter into an infiniteloop when incorrectly handling certain server responses (100 continue response).

Abstractbasicauthhandler classin python contains regex with a quadratic worst-case time complexity.
Specially crafted traffic from a malicious http server could cause a regularexpression denial of service (redos) condition for a client.
Specially crafted traffic from a malicious http server could cause a denial ofservice (dos) condition for a client.

CVSS V3 rated as Medium - 4.2 severity.

CVSS V2 rated as Medium - 5.4 severity.

Solution

Refer to Ubuntu security advisory USN-5199-1 for updates and patch information.

Vendor References

USN-5199-1 - ubuntu.com/security/notices/USN-5199-1

CVEs related to QID 198609

CVE-2021-3733 | CVE-2021-3737 |

Software Advisories

Advisory ID	Software	Component	Link
USN-5199-1	Ubuntu Linux		ubuntu.com/security/notices/USN-5199-1

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