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
7.8 High
AI Score
Confidence
High
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
0.009 Low
EPSS
Percentile
82.1%
Issue Overview:
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs. (CVE-2019-19956)
A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service. System availability is the highest threat from this vulnerability. (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)
Affected Packages:
libxml2
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 libxml2 to update your system.
New Packages:
aarch64:
libxml2-2.9.1-6.amzn2.5.1.aarch64
libxml2-devel-2.9.1-6.amzn2.5.1.aarch64
libxml2-static-2.9.1-6.amzn2.5.1.aarch64
libxml2-python-2.9.1-6.amzn2.5.1.aarch64
libxml2-debuginfo-2.9.1-6.amzn2.5.1.aarch64
i686:
libxml2-2.9.1-6.amzn2.5.1.i686
libxml2-devel-2.9.1-6.amzn2.5.1.i686
libxml2-static-2.9.1-6.amzn2.5.1.i686
libxml2-python-2.9.1-6.amzn2.5.1.i686
libxml2-debuginfo-2.9.1-6.amzn2.5.1.i686
src:
libxml2-2.9.1-6.amzn2.5.1.src
x86_64:
libxml2-2.9.1-6.amzn2.5.1.x86_64
libxml2-devel-2.9.1-6.amzn2.5.1.x86_64
libxml2-static-2.9.1-6.amzn2.5.1.x86_64
libxml2-python-2.9.1-6.amzn2.5.1.x86_64
libxml2-debuginfo-2.9.1-6.amzn2.5.1.x86_64
Red Hat: CVE-2019-19956, CVE-2019-20388, CVE-2020-7595
Mitre: CVE-2019-19956, CVE-2019-20388, CVE-2020-7595
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | libxml2 | < 2.9.1-6.amzn2.5.1 | libxml2-2.9.1-6.amzn2.5.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-devel | < 2.9.1-6.amzn2.5.1 | libxml2-devel-2.9.1-6.amzn2.5.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-static | < 2.9.1-6.amzn2.5.1 | libxml2-static-2.9.1-6.amzn2.5.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-python | < 2.9.1-6.amzn2.5.1 | libxml2-python-2.9.1-6.amzn2.5.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-debuginfo | < 2.9.1-6.amzn2.5.1 | libxml2-debuginfo-2.9.1-6.amzn2.5.1.aarch64.rpm |
Amazon Linux | 2 | i686 | libxml2 | < 2.9.1-6.amzn2.5.1 | libxml2-2.9.1-6.amzn2.5.1.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-devel | < 2.9.1-6.amzn2.5.1 | libxml2-devel-2.9.1-6.amzn2.5.1.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-static | < 2.9.1-6.amzn2.5.1 | libxml2-static-2.9.1-6.amzn2.5.1.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-python | < 2.9.1-6.amzn2.5.1 | libxml2-python-2.9.1-6.amzn2.5.1.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-debuginfo | < 2.9.1-6.amzn2.5.1 | libxml2-debuginfo-2.9.1-6.amzn2.5.1.i686.rpm |
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
7.8 High
AI Score
Confidence
High
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
0.009 Low
EPSS
Percentile
82.1%