CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
88.7%
Issue Overview:
xpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory corruption) via a crafted XML document. (CVE-2016-4658)
parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a ‘%’ character in a DTD name. (CVE-2017-16931)
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.amzn2.3.3.aarch64
libxml2-devel-2.9.1-6.amzn2.3.3.aarch64
libxml2-static-2.9.1-6.amzn2.3.3.aarch64
libxml2-python-2.9.1-6.amzn2.3.3.aarch64
libxml2-debuginfo-2.9.1-6.amzn2.3.3.aarch64
i686:
libxml2-2.9.1-6.amzn2.3.3.i686
libxml2-devel-2.9.1-6.amzn2.3.3.i686
libxml2-static-2.9.1-6.amzn2.3.3.i686
libxml2-python-2.9.1-6.amzn2.3.3.i686
libxml2-debuginfo-2.9.1-6.amzn2.3.3.i686
src:
libxml2-2.9.1-6.amzn2.3.3.src
x86_64:
libxml2-2.9.1-6.amzn2.3.3.x86_64
libxml2-devel-2.9.1-6.amzn2.3.3.x86_64
libxml2-static-2.9.1-6.amzn2.3.3.x86_64
libxml2-python-2.9.1-6.amzn2.3.3.x86_64
libxml2-debuginfo-2.9.1-6.amzn2.3.3.x86_64
Red Hat: CVE-2016-4658, CVE-2017-16931
Mitre: CVE-2016-4658, CVE-2017-16931
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | libxml2 | < 2.9.1-6.amzn2.3.3 | libxml2-2.9.1-6.amzn2.3.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-devel | < 2.9.1-6.amzn2.3.3 | libxml2-devel-2.9.1-6.amzn2.3.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-static | < 2.9.1-6.amzn2.3.3 | libxml2-static-2.9.1-6.amzn2.3.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-python | < 2.9.1-6.amzn2.3.3 | libxml2-python-2.9.1-6.amzn2.3.3.aarch64.rpm |
Amazon Linux | 2 | aarch64 | libxml2-debuginfo | < 2.9.1-6.amzn2.3.3 | libxml2-debuginfo-2.9.1-6.amzn2.3.3.aarch64.rpm |
Amazon Linux | 2 | i686 | libxml2 | < 2.9.1-6.amzn2.3.3 | libxml2-2.9.1-6.amzn2.3.3.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-devel | < 2.9.1-6.amzn2.3.3 | libxml2-devel-2.9.1-6.amzn2.3.3.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-static | < 2.9.1-6.amzn2.3.3 | libxml2-static-2.9.1-6.amzn2.3.3.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-python | < 2.9.1-6.amzn2.3.3 | libxml2-python-2.9.1-6.amzn2.3.3.i686.rpm |
Amazon Linux | 2 | i686 | libxml2-debuginfo | < 2.9.1-6.amzn2.3.3 | libxml2-debuginfo-2.9.1-6.amzn2.3.3.i686.rpm |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
88.7%