ALAS2-2020-1513


Amazon Linux 2 Security Advisory: ALAS-2020-1513
Advisory Release Date: 2020-10-22 17:32 Pacific
Advisory Updated Date: 2020-10-22 22:36 Pacific
Severity: Medium

Issue Overview:

It was discovered that the "setElementTypePrefix()" function incorrectly extracted XML namespace prefixes. By tricking an application into processing a specially crafted XML file, an attacker could cause unusually high consumption of memory resources and possibly lead to a denial of service. (CVE-2018-20843 )

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read. (CVE-2019-15903 )


Affected Packages:

expat


Issue Correction:
Run yum update expat to update your system.

New Packages:
aarch64:
    expat-2.1.0-12.amzn2.aarch64
    expat-devel-2.1.0-12.amzn2.aarch64
    expat-static-2.1.0-12.amzn2.aarch64
    expat-debuginfo-2.1.0-12.amzn2.aarch64

i686:
    expat-2.1.0-12.amzn2.i686
    expat-devel-2.1.0-12.amzn2.i686
    expat-static-2.1.0-12.amzn2.i686
    expat-debuginfo-2.1.0-12.amzn2.i686

src:
    expat-2.1.0-12.amzn2.src

x86_64:
    expat-2.1.0-12.amzn2.x86_64
    expat-devel-2.1.0-12.amzn2.x86_64
    expat-static-2.1.0-12.amzn2.x86_64
    expat-debuginfo-2.1.0-12.amzn2.x86_64