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amazonAmazonALAS2-2018-1045
HistoryAug 08, 2018 - 4:34 p.m.

Important: gnupg2

2018-08-0816:34:00
alas.aws.amazon.com
23

7.5 High

CVSS3

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

8 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.004 Low

EPSS

Percentile

74.1%

Issue Overview:

A data validation flaw was found in the way gnupg processes file names during decryption and signature validation. An attacker may be able to inject messages into gnupg verbose message logging which may have the potential to bypass the integrity of signature authentication mechanisms and could have other unintended consequences if applications take action(s) based on parsed verbose gnupg output.(CVE-2018-12020)

Affected Packages:

gnupg2

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 gnupg2 to update your system.

New Packages:

i686:  
    gnupg2-2.0.22-5.amzn2.0.2.i686  
    gnupg2-smime-2.0.22-5.amzn2.0.2.i686  
    gnupg2-debuginfo-2.0.22-5.amzn2.0.2.i686  
  
src:  
    gnupg2-2.0.22-5.amzn2.0.2.src  
  
x86_64:  
    gnupg2-2.0.22-5.amzn2.0.2.x86_64  
    gnupg2-smime-2.0.22-5.amzn2.0.2.x86_64  
    gnupg2-debuginfo-2.0.22-5.amzn2.0.2.x86_64  

Additional References

Red Hat: CVE-2018-12020

Mitre: CVE-2018-12020

7.5 High

CVSS3

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

8 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.004 Low

EPSS

Percentile

74.1%