ALAS2-2019-1204

Amazon Linux 2 Security Advisory: ALAS-2019-1204
Advisory Release Date: 2019-05-02 18:48 Pacific
Advisory Updated Date: 2019-06-13 18:43 Pacific
Severity: Important
Issue Overview:

Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly.(CVE-2019-9636)

Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. (CVE-2018-20406)


Affected Packages:

python3


Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.


Issue Correction:
Run yum update python3 to update your system.

New Packages:
aarch64:
    python3-3.7.3-1.amzn2.0.1.aarch64
    python3-libs-3.7.3-1.amzn2.0.1.aarch64
    python3-devel-3.7.3-1.amzn2.0.1.aarch64
    python3-tools-3.7.3-1.amzn2.0.1.aarch64
    python3-tkinter-3.7.3-1.amzn2.0.1.aarch64
    python3-test-3.7.3-1.amzn2.0.1.aarch64
    python3-debug-3.7.3-1.amzn2.0.1.aarch64
    python3-debuginfo-3.7.3-1.amzn2.0.1.aarch64

i686:
    python3-3.7.3-1.amzn2.0.1.i686
    python3-libs-3.7.3-1.amzn2.0.1.i686
    python3-devel-3.7.3-1.amzn2.0.1.i686
    python3-tools-3.7.3-1.amzn2.0.1.i686
    python3-tkinter-3.7.3-1.amzn2.0.1.i686
    python3-test-3.7.3-1.amzn2.0.1.i686
    python3-debug-3.7.3-1.amzn2.0.1.i686
    python3-debuginfo-3.7.3-1.amzn2.0.1.i686

src:
    python3-3.7.3-1.amzn2.0.1.src

x86_64:
    python3-3.7.3-1.amzn2.0.1.x86_64
    python3-libs-3.7.3-1.amzn2.0.1.x86_64
    python3-devel-3.7.3-1.amzn2.0.1.x86_64
    python3-tools-3.7.3-1.amzn2.0.1.x86_64
    python3-tkinter-3.7.3-1.amzn2.0.1.x86_64
    python3-test-3.7.3-1.amzn2.0.1.x86_64
    python3-debug-3.7.3-1.amzn2.0.1.x86_64
    python3-debuginfo-3.7.3-1.amzn2.0.1.x86_64

Additional References

Red Hat: CVE-2018-20406, CVE-2019-9636

Mitre: CVE-2018-20406, CVE-2019-9636