Amazon Linux 2 : libxml2 (ALAS-2020-1534)

Medium Nessus Plugin ID 141978

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VPR Score: 3.6

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2020-1534 advisory.

- xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs. (CVE-2019-19956)

- xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
(CVE-2019-20388)

- xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation. (CVE-2020-7595)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update libxml2' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2020-1534.html

https://access.redhat.com/security/cve/CVE-2019-19956

https://access.redhat.com/security/cve/CVE-2019-20388

https://access.redhat.com/security/cve/CVE-2020-7595

Plugin Details

Severity: Medium

ID: 141978

File Name: al2_ALAS-2020-1534.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2020/10/28

Updated: 2020/10/28

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2020-7595

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libxml2, p-cpe:/a:amazon:linux:libxml2-debuginfo, p-cpe:/a:amazon:linux:libxml2-devel, p-cpe:/a:amazon:linux:libxml2-python, p-cpe:/a:amazon:linux:libxml2-static, cpe:/o:amazon:linux:2

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/10/22

Vulnerability Publication Date: 2019/12/24

Reference Information

CVE: CVE-2019-19956, CVE-2019-20388, CVE-2020-7595

ALAS: 2020-1534