ALAS2-2020-1432


Amazon Linux 2 Security Advisory: ALAS-2020-1432
Advisory Release Date: 2020-06-01 22:38 Pacific
Advisory Updated Date: 2020-06-03 18:51 Pacific
Severity: Medium

Issue Overview:

http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.(CVE-2018-20852 )

Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.(CVE-2020-8492 )


Affected Packages:

python


Issue Correction:
Run yum update python to update your system.

New Packages:
aarch64:
    python-2.7.18-1.amzn2.aarch64
    python-libs-2.7.18-1.amzn2.aarch64
    python-devel-2.7.18-1.amzn2.aarch64
    python-tools-2.7.18-1.amzn2.aarch64
    tkinter-2.7.18-1.amzn2.aarch64
    python-test-2.7.18-1.amzn2.aarch64
    python-debug-2.7.18-1.amzn2.aarch64
    python-debuginfo-2.7.18-1.amzn2.aarch64

i686:
    python-2.7.18-1.amzn2.i686
    python-libs-2.7.18-1.amzn2.i686
    python-devel-2.7.18-1.amzn2.i686
    python-tools-2.7.18-1.amzn2.i686
    tkinter-2.7.18-1.amzn2.i686
    python-test-2.7.18-1.amzn2.i686
    python-debug-2.7.18-1.amzn2.i686
    python-debuginfo-2.7.18-1.amzn2.i686

src:
    python-2.7.18-1.amzn2.src

x86_64:
    python-2.7.18-1.amzn2.x86_64
    python-libs-2.7.18-1.amzn2.x86_64
    python-devel-2.7.18-1.amzn2.x86_64
    python-tools-2.7.18-1.amzn2.x86_64
    tkinter-2.7.18-1.amzn2.x86_64
    python-test-2.7.18-1.amzn2.x86_64
    python-debug-2.7.18-1.amzn2.x86_64
    python-debuginfo-2.7.18-1.amzn2.x86_64