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ubuntuUbuntuUSN-5638-2
HistoryNov 17, 2022 - 12:00 a.m.

Expat vulnerabilities

2022-11-1700:00:00
ubuntu.com
25

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

AI Score

Confidence

High

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.005 Low

EPSS

Percentile

76.9%

JSON

Releases

  • Ubuntu 22.04 LTS
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 ESM

Packages

  • expat - XML parsing C library

Details

USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS.

It was discovered that Expat incorrectly handled memory in out-of-memory
situations. An attacker could possibly use this issue to cause a crash,
resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 18.04 LTS. (CVE-2022-43680)

Original advisory details:

Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.

OSVersionArchitecturePackageVersionFilename
Ubuntu22.04noarchexpat< 2.4.7-1ubuntu0.1UNKNOWN
Ubuntu22.04noarchexpat-dbgsym< 2.4.7-1ubuntu0.1UNKNOWN
Ubuntu22.04noarchlibexpat1< 2.4.7-1ubuntu0.1UNKNOWN
Ubuntu22.04noarchlibexpat1-dbgsym< 2.4.7-1ubuntu0.1UNKNOWN
Ubuntu22.04noarchlibexpat1-dev< 2.4.7-1ubuntu0.1UNKNOWN
Ubuntu20.04noarchexpat< 2.2.9-1ubuntu0.5UNKNOWN
Ubuntu20.04noarchexpat-dbgsym< 2.2.9-1ubuntu0.5UNKNOWN
Ubuntu20.04noarchlibexpat1< 2.2.9-1ubuntu0.5UNKNOWN
Ubuntu20.04noarchlibexpat1-dbgsym< 2.2.9-1ubuntu0.5UNKNOWN
Ubuntu20.04noarchlibexpat1-dev< 2.2.9-1ubuntu0.5UNKNOWN
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8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

AI Score

Confidence

High

5.1 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.005 Low

EPSS

Percentile

76.9%

JSON
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