Amazon Linux AMI update for python27

Published: 2018-12-07

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-1061 CVE-2018-1060
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU12282

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-1061

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on he target system.

The weakness exists due to the way catastrophic backtracking was implemented in python's difflib.IS_LINE_JUNK method difflib. A remote attacker can cause the service to crash.

Mitigation

Update the affected packages.

i686:
    python27-libs-2.7.15-1.124.amzn1.i686
    python27-debuginfo-2.7.15-1.124.amzn1.i686
    python27-test-2.7.15-1.124.amzn1.i686
    python27-2.7.15-1.124.amzn1.i686
    python27-devel-2.7.15-1.124.amzn1.i686
    python27-tools-2.7.15-1.124.amzn1.i686

src:
    python27-2.7.15-1.124.amzn1.src

x86_64:
    python27-debuginfo-2.7.15-1.124.amzn1.x86_64
    python27-libs-2.7.15-1.124.amzn1.x86_64
    python27-devel-2.7.15-1.124.amzn1.x86_64
    python27-tools-2.7.15-1.124.amzn1.x86_64
    python27-test-2.7.15-1.124.amzn1.x86_64
    python27-2.7.15-1.124.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

https://alas.aws.amazon.com/ALAS-2018-1108.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.

2) Improper input validation

EUVDB-ID: #VU12283