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amazonAmazonALAS2-2021-1639
HistoryMay 20, 2021 - 4:07 p.m.

Medium: python-pip

2021-05-2016:07:00
alas.aws.amazon.com
41
python-pip
directory traversal
content-disposition
amazon linux 2

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

7.9

Confidence

High

EPSS

0.004

Percentile

73.8%

Issue Overview:

The pip package before 19.2 for Python allows Directory Traversal when a URL is given in an install command, because a Content-Disposition header can have …/ in a filename, as demonstrated by overwriting the /root/.ssh/authorized_keys file. This occurs in _download_http_url in _internal/download.py. (CVE-2019-20916)

Affected Packages:

python-pip

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-pip to update your system.

New Packages:

noarch:  
    python2-pip-20.2.2-1.amzn2.0.2.noarch  
    python3-pip-20.2.2-1.amzn2.0.2.noarch  
    python-pip-wheel-20.2.2-1.amzn2.0.2.noarch  
  
src:  
    python-pip-20.2.2-1.amzn2.0.2.src  

Additional References

Red Hat: CVE-2019-20916

Mitre: CVE-2019-20916

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

7.9

Confidence

High

EPSS

0.004

Percentile

73.8%