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amazonAmazonALAS2-2023-1908
HistoryJan 18, 2023 - 12:16 a.m.

Important: libtasn1

2023-01-1800:16:00
alas.aws.amazon.com
25

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

9.5 High

AI Score

Confidence

High

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

72.1%

JSON

Issue Overview:

GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der. (CVE-2021-46848)

Affected Packages:

libtasn1

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 libtasn1 to update your system.

New Packages:

aarch64:  
    libtasn1-4.10-1.amzn2.0.3.aarch64  
    libtasn1-devel-4.10-1.amzn2.0.3.aarch64  
    libtasn1-tools-4.10-1.amzn2.0.3.aarch64  
    libtasn1-debuginfo-4.10-1.amzn2.0.3.aarch64  
  
i686:  
    libtasn1-4.10-1.amzn2.0.3.i686  
    libtasn1-devel-4.10-1.amzn2.0.3.i686  
    libtasn1-tools-4.10-1.amzn2.0.3.i686  
    libtasn1-debuginfo-4.10-1.amzn2.0.3.i686  
  
src:  
    libtasn1-4.10-1.amzn2.0.3.src  
  
x86_64:  
    libtasn1-4.10-1.amzn2.0.3.x86_64  
    libtasn1-devel-4.10-1.amzn2.0.3.x86_64  
    libtasn1-tools-4.10-1.amzn2.0.3.x86_64  
    libtasn1-debuginfo-4.10-1.amzn2.0.3.x86_64

Additional References

Red Hat: CVE-2021-46848

Mitre: CVE-2021-46848

OSVersionArchitecturePackageVersionFilename
Amazon Linux2aarch64libtasn1< 4.10-1.amzn2.0.3libtasn1-4.10-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64libtasn1-devel< 4.10-1.amzn2.0.3libtasn1-devel-4.10-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64libtasn1-tools< 4.10-1.amzn2.0.3libtasn1-tools-4.10-1.amzn2.0.3.aarch64.rpm
Amazon Linux2aarch64libtasn1-debuginfo< 4.10-1.amzn2.0.3libtasn1-debuginfo-4.10-1.amzn2.0.3.aarch64.rpm
Amazon Linux2i686libtasn1< 4.10-1.amzn2.0.3libtasn1-4.10-1.amzn2.0.3.i686.rpm
Amazon Linux2i686libtasn1-devel< 4.10-1.amzn2.0.3libtasn1-devel-4.10-1.amzn2.0.3.i686.rpm
Amazon Linux2i686libtasn1-tools< 4.10-1.amzn2.0.3libtasn1-tools-4.10-1.amzn2.0.3.i686.rpm
Amazon Linux2i686libtasn1-debuginfo< 4.10-1.amzn2.0.3libtasn1-debuginfo-4.10-1.amzn2.0.3.i686.rpm
Amazon Linux2x86_64libtasn1< 4.10-1.amzn2.0.3libtasn1-4.10-1.amzn2.0.3.x86_64.rpm
Amazon Linux2x86_64libtasn1-devel< 4.10-1.amzn2.0.3libtasn1-devel-4.10-1.amzn2.0.3.x86_64.rpm
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9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

9.5 High

AI Score

Confidence

High

6.4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.004 Low

EPSS

Percentile

72.1%

JSON
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