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UbuntuUSN-5638-2HistoryNov 17, 2022 - 12:00 a.m.
Expat vulnerabilities
2022-11-1700:00:00
ubuntu.com
40
expat xml library
ubuntu 18.04 lts
ubuntu 20.04 lts
ubuntu 22.04 lts
denial of service
arbitrary code
memory handling
CVSS3
8.1
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
AI Score
9
Confidence
High
EPSS
0.006
Percentile
77.8%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Ubuntu | 22.04 | noarch | expat | < 2.4.7-1ubuntu0.1 | UNKNOWN |
| Ubuntu | 22.04 | noarch | expat-dbgsym | < 2.4.7-1ubuntu0.1 | UNKNOWN |
| Ubuntu | 22.04 | noarch | libexpat1 | < 2.4.7-1ubuntu0.1 | UNKNOWN |
| Ubuntu | 22.04 | noarch | libexpat1-dbgsym | < 2.4.7-1ubuntu0.1 | UNKNOWN |
| Ubuntu | 22.04 | noarch | libexpat1-dev | < 2.4.7-1ubuntu0.1 | UNKNOWN |
| Ubuntu | 20.04 | noarch | expat | < 2.2.9-1ubuntu0.5 | UNKNOWN |
| Ubuntu | 20.04 | noarch | expat-dbgsym | < 2.2.9-1ubuntu0.5 | UNKNOWN |
| Ubuntu | 20.04 | noarch | libexpat1 | < 2.2.9-1ubuntu0.5 | UNKNOWN |
| Ubuntu | 20.04 | noarch | libexpat1-dbgsym | < 2.2.9-1ubuntu0.5 | UNKNOWN |
| Ubuntu | 20.04 | noarch | libexpat1-dev | < 2.2.9-1ubuntu0.5 | UNKNOWN |
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CVSS3
8.1
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
AI Score
9
Confidence
High
EPSS
0.006
Percentile
77.8%
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