Amazon Linux AMI update for python27, python35, python36

1) Cross-site scripting

EUVDB-ID: #VU21440

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-16935

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing the server_title field in the XML-RPC server (Lib/DocXMLRPCServer.py) in Python 2.x, and in Lib/xmlrpc/server.py in Python 3.x. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update the affected packages:

i686:
    python27-tools-2.7.16-1.131.amzn1.i686
    python27-devel-2.7.16-1.131.amzn1.i686
    python27-test-2.7.16-1.131.amzn1.i686
    python27-libs-2.7.16-1.131.amzn1.i686
    python27-debuginfo-2.7.16-1.131.amzn1.i686
    python27-2.7.16-1.131.amzn1.i686
    python35-debuginfo-3.5.7-1.25.amzn1.i686
    python35-tools-3.5.7-1.25.amzn1.i686
    python35-libs-3.5.7-1.25.amzn1.i686
    python35-devel-3.5.7-1.25.amzn1.i686
    python35-3.5.7-1.25.amzn1.i686
    python35-test-3.5.7-1.25.amzn1.i686
    python36-debuginfo-3.6.10-1.16.amzn1.i686
    python36-libs-3.6.10-1.16.amzn1.i686
    python36-test-3.6.10-1.16.amzn1.i686
    python36-debug-3.6.10-1.16.amzn1.i686
    python36-tools-3.6.10-1.16.amzn1.i686
    python36-devel-3.6.10-1.16.amzn1.i686
    python36-3.6.10-1.16.amzn1.i686

src:
    python27-2.7.16-1.131.amzn1.src
    python35-3.5.7-1.25.amzn1.src
    python36-3.6.10-1.16.amzn1.src

x86_64:
    python27-2.7.16-1.131.amzn1.x86_64
    python27-libs-2.7.16-1.131.amzn1.x86_64
    python27-test-2.7.16-1.131.amzn1.x86_64
    python27-tools-2.7.16-1.131.amzn1.x86_64
    python27-devel-2.7.16-1.131.amzn1.x86_64
    python27-debuginfo-2.7.16-1.131.amzn1.x86_64
    python35-devel-3.5.7-1.25.amzn1.x86_64
    python35-tools-3.5.7-1.25.amzn1.x86_64
    python35-test-3.5.7-1.25.amzn1.x86_64
    python35-debuginfo-3.5.7-1.25.amzn1.x86_64
    python35-3.5.7-1.25.amzn1.x86_64
    python35-libs-3.5.7-1.25.amzn1.x86_64
    python36-tools-3.6.10-1.16.amzn1.x86_64
    python36-debug-3.6.10-1.16.amzn1.x86_64
    python36-test-3.6.10-1.16.amzn1.x86_64
    python36-devel-3.6.10-1.16.amzn1.x86_64
    python36-libs-3.6.10-1.16.amzn1.x86_64
    python36-3.6.10-1.16.amzn1.x86_64
    python36-debuginfo-3.6.10-1.16.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1342.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.