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amazonAmazonALAS2-2022-1754
HistoryMar 01, 2022 - 5:39 p.m.

Medium: expat

2022-03-0117:39:00
alas.aws.amazon.com
26

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.8 High

AI Score

Confidence

High

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.014 Low

EPSS

Percentile

86.3%

Issue Overview:

expat (libexpat) is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability, confidentiality and integrity. (CVE-2022-23852)

Affected Packages:

expat

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 expat to update your system.

New Packages:

aarch64:  
    expat-2.1.0-12.amzn2.0.1.aarch64  
    expat-devel-2.1.0-12.amzn2.0.1.aarch64  
    expat-static-2.1.0-12.amzn2.0.1.aarch64  
    expat-debuginfo-2.1.0-12.amzn2.0.1.aarch64  
  
i686:  
    expat-2.1.0-12.amzn2.0.1.i686  
    expat-devel-2.1.0-12.amzn2.0.1.i686  
    expat-static-2.1.0-12.amzn2.0.1.i686  
    expat-debuginfo-2.1.0-12.amzn2.0.1.i686  
  
src:  
    expat-2.1.0-12.amzn2.0.1.src  
  
x86_64:  
    expat-2.1.0-12.amzn2.0.1.x86_64  
    expat-devel-2.1.0-12.amzn2.0.1.x86_64  
    expat-static-2.1.0-12.amzn2.0.1.x86_64  
    expat-debuginfo-2.1.0-12.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2022-23852

Mitre: CVE-2022-23852

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.8 High

AI Score

Confidence

High

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.014 Low

EPSS

Percentile

86.3%