ALAS-2021-1500


Amazon Linux AMI Security Advisory: ALAS-2021-1500
Advisory Release Date: 2021-05-14 16:53 Pacific
Advisory Updated Date: 2021-05-19 17:35 Pacific
Severity: Medium

Issue Overview:

The package python/cpython is vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter. (CVE-2021-23336)

No description is available for this CVE. (CVE-2021-3426)


Affected Packages:

python36


Issue Correction:
Run yum update python36 to update your system.

New Packages:
i686:
    python36-tools-3.6.12-1.21.amzn1.i686
    python36-debuginfo-3.6.12-1.21.amzn1.i686
    python36-test-3.6.12-1.21.amzn1.i686
    python36-3.6.12-1.21.amzn1.i686
    python36-debug-3.6.12-1.21.amzn1.i686
    python36-devel-3.6.12-1.21.amzn1.i686
    python36-libs-3.6.12-1.21.amzn1.i686

src:
    python36-3.6.12-1.21.amzn1.src

x86_64:
    python36-debuginfo-3.6.12-1.21.amzn1.x86_64
    python36-libs-3.6.12-1.21.amzn1.x86_64
    python36-debug-3.6.12-1.21.amzn1.x86_64
    python36-3.6.12-1.21.amzn1.x86_64
    python36-tools-3.6.12-1.21.amzn1.x86_64
    python36-test-3.6.12-1.21.amzn1.x86_64
    python36-devel-3.6.12-1.21.amzn1.x86_64