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amazonAmazonALAS2-2021-1669
HistoryJun 16, 2021 - 8:37 p.m.

Medium: python

2021-06-1620:37:00
alas.aws.amazon.com
37
python
http request
vulnerability
confidentiality
integrity
cve-2020-26116

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

7.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

AI Score

8.5

Confidence

High

EPSS

0.004

Percentile

72.3%

Issue Overview:

A flaw was found in Python. The built-in modules httplib and http.client (included in Python 2 and Python 3, respectively) do not properly validate CRLF sequences in the HTTP request method, potentially allowing manipulation to the request by injecting additional HTTP headers. The highest threat from this vulnerability is to confidentiality and integrity. (CVE-2020-26116)

Affected Packages:

python

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

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

New Packages:

aarch64:  
    python-2.7.18-1.amzn2.0.4.aarch64  
    python-libs-2.7.18-1.amzn2.0.4.aarch64  
    python-devel-2.7.18-1.amzn2.0.4.aarch64  
    python-tools-2.7.18-1.amzn2.0.4.aarch64  
    tkinter-2.7.18-1.amzn2.0.4.aarch64  
    python-test-2.7.18-1.amzn2.0.4.aarch64  
    python-debug-2.7.18-1.amzn2.0.4.aarch64  
    python-debuginfo-2.7.18-1.amzn2.0.4.aarch64  
  
i686:  
    python-2.7.18-1.amzn2.0.4.i686  
    python-libs-2.7.18-1.amzn2.0.4.i686  
    python-devel-2.7.18-1.amzn2.0.4.i686  
    python-tools-2.7.18-1.amzn2.0.4.i686  
    tkinter-2.7.18-1.amzn2.0.4.i686  
    python-test-2.7.18-1.amzn2.0.4.i686  
    python-debug-2.7.18-1.amzn2.0.4.i686  
    python-debuginfo-2.7.18-1.amzn2.0.4.i686  
  
src:  
    python-2.7.18-1.amzn2.0.4.src  
  
x86_64:  
    python-2.7.18-1.amzn2.0.4.x86_64  
    python-libs-2.7.18-1.amzn2.0.4.x86_64  
    python-devel-2.7.18-1.amzn2.0.4.x86_64  
    python-tools-2.7.18-1.amzn2.0.4.x86_64  
    tkinter-2.7.18-1.amzn2.0.4.x86_64  
    python-test-2.7.18-1.amzn2.0.4.x86_64  
    python-debug-2.7.18-1.amzn2.0.4.x86_64  
    python-debuginfo-2.7.18-1.amzn2.0.4.x86_64  

Additional References

Red Hat: CVE-2020-26116

Mitre: CVE-2020-26116

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS3

7.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

AI Score

8.5

Confidence

High

EPSS

0.004

Percentile

72.3%