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amazonAmazonALAS-2022-1655
HistoryDec 01, 2022 - 5:34 p.m.

Important: expat

2022-12-0117:34:00
alas.aws.amazon.com
9

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

0.005 Low

EPSS

Percentile

76.5%

Issue Overview:

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. (CVE-2022-43680)

Affected Packages:

expat

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

New Packages:

i686:  
    expat-debuginfo-2.1.0-15.33.amzn1.i686  
    expat-devel-2.1.0-15.33.amzn1.i686  
    expat-2.1.0-15.33.amzn1.i686  
  
src:  
    expat-2.1.0-15.33.amzn1.src  
  
x86_64:  
    expat-devel-2.1.0-15.33.amzn1.x86_64  
    expat-2.1.0-15.33.amzn1.x86_64  
    expat-debuginfo-2.1.0-15.33.amzn1.x86_64  

Additional References

Red Hat: CVE-2022-43680

Mitre: CVE-2022-43680

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

0.005 Low

EPSS

Percentile

76.5%