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amazonAmazonALAS-2020-1427
HistoryAug 27, 2020 - 12:20 a.m.

Medium: python27

2020-08-2700:20:00
alas.aws.amazon.com
20

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.011 Low

EPSS

Percentile

84.2%

Issue Overview:

In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation. (CVE-2019-20907)

Affected Packages:

python27

Issue Correction:
Run yum update python27 to update your system.

New Packages:

i686:  
    python27-tools-2.7.18-2.139.amzn1.i686  
    python27-test-2.7.18-2.139.amzn1.i686  
    python27-2.7.18-2.139.amzn1.i686  
    python27-debuginfo-2.7.18-2.139.amzn1.i686  
    python27-devel-2.7.18-2.139.amzn1.i686  
    python27-libs-2.7.18-2.139.amzn1.i686  
  
src:  
    python27-2.7.18-2.139.amzn1.src  
  
x86_64:  
    python27-debuginfo-2.7.18-2.139.amzn1.x86_64  
    python27-2.7.18-2.139.amzn1.x86_64  
    python27-test-2.7.18-2.139.amzn1.x86_64  
    python27-devel-2.7.18-2.139.amzn1.x86_64  
    python27-libs-2.7.18-2.139.amzn1.x86_64  
    python27-tools-2.7.18-2.139.amzn1.x86_64  

Additional References

Red Hat: CVE-2019-20907

Mitre: CVE-2019-20907

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.011 Low

EPSS

Percentile

84.2%

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