Amazon Linux AMI update for python27

1) Information disclosure

EUVDB-ID: #VU19256

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-20852

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the "http.cookiejar.DefaultPolicy.domain_return_ok" in the "Lib/http/cookiejar.py" file returns incorrect results during cookie domain checks. A remote attacker can trick a victim to execute a program that uses the "http.cookiejar.DefaultPolicy" to make an HTTP connection to an attacker-controlled server with a hostname that has another valid hostname as a suffix.

Successful exploitation of this vulnerability can allow an attacker to gain unauthorized access to sensitive information on the system, such as existing cookies.

Mitigation

Update the affected packages:

i686:
    python27-devel-2.7.18-1.137.amzn1.i686
    python27-libs-2.7.18-1.137.amzn1.i686
    python27-test-2.7.18-1.137.amzn1.i686
    python27-tools-2.7.18-1.137.amzn1.i686
    python27-2.7.18-1.137.amzn1.i686
    python27-debuginfo-2.7.18-1.137.amzn1.i686

src:
    python27-2.7.18-1.137.amzn1.src

x86_64:
    python27-devel-2.7.18-1.137.amzn1.x86_64
    python27-debuginfo-2.7.18-1.137.amzn1.x86_64
    python27-2.7.18-1.137.amzn1.x86_64
    python27-tools-2.7.18-1.137.amzn1.x86_64
    python27-test-2.7.18-1.137.amzn1.x86_64
    python27-libs-2.7.18-1.137.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:

External links

http://alas.aws.amazon.com/ALAS-2020-1375.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.