SB2020070191 - Fedora 32 update for python36

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Main Vulnerability Database SB2020070191

SB2020070191 - Fedora 32 update for python36

Published: July 1, 2020 Updated: April 25, 2025

Security Bulletin ID SB2020070191
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) CRLF injection (CVE-ID: CVE-2019-18348)

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.)


2) Resource management error (CVE-ID: CVE-2020-8492)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation in urllib.request.AbstractBasicAuthHandler when processing HTTP responses. A remote attacker who controls a HTTP server can send a specially crafted HTTP response to the client application and conduct Regular Expression Denial of Service (ReDoS) attack.


Remediation

Install update from vendor's website.

References