ALAS-2019-1324


Amazon Linux AMI Security Advisory: ALAS-2019-1324
Advisory Release Date: 2019-11-22 03:19 Pacific
Severity: Important

Issue Overview:

A security regression of CVE-2019-9636 was discovered in python, since commit d537ab0ff9767ef024f26246899728f0116b1ec3, which still allows an attacker to exploit CVE-2019-9636 by abusing the user and password parts of a URL. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application. (CVE-2019-10160 )

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the query string after a ? character) followed by an HTTP header or a Redis command. (CVE-2019-9740 )

urllib in Python 2.x through 2.7.16 supports the local_file: scheme, which makes it easier for remote attackers to bypass protection mechanisms that blacklist file: URIs, as demonstrated by triggering a urllib.urlopen('local_file:///etc/passwd') call. (CVE-2019-9948 )

An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. (CVE-2019-9947 )

An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340 ; however, this CVE applies to Python more generally. (CVE-2019-16056 )

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 )


Affected Packages:

python34


Issue Correction:
Run yum update python34 to update your system.

New Packages:
i686:
    python34-devel-3.4.10-1.49.amzn1.i686
    python34-test-3.4.10-1.49.amzn1.i686
    python34-3.4.10-1.49.amzn1.i686
    python34-debuginfo-3.4.10-1.49.amzn1.i686
    python34-libs-3.4.10-1.49.amzn1.i686
    python34-tools-3.4.10-1.49.amzn1.i686

src:
    python34-3.4.10-1.49.amzn1.src

x86_64:
    python34-debuginfo-3.4.10-1.49.amzn1.x86_64
    python34-test-3.4.10-1.49.amzn1.x86_64
    python34-devel-3.4.10-1.49.amzn1.x86_64
    python34-libs-3.4.10-1.49.amzn1.x86_64
    python34-tools-3.4.10-1.49.amzn1.x86_64
    python34-3.4.10-1.49.amzn1.x86_64