ALAS-2021-1507


Amazon Linux AMI Security Advisory: ALAS-2021-1507
Advisory Release Date: 2021-06-01 17:58 Pacific
Advisory Updated Date: 2021-06-02 00:04 Pacific
Severity: Important
References: CVE-2021-23017 

Issue Overview:

A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in certain circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-23017)


Affected Packages:

nginx


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

New Packages:
i686:
    nginx-mod-stream-1.18.0-1.43.amzn1.i686
    nginx-mod-mail-1.18.0-1.43.amzn1.i686
    nginx-mod-http-image-filter-1.18.0-1.43.amzn1.i686
    nginx-mod-http-perl-1.18.0-1.43.amzn1.i686
    nginx-debuginfo-1.18.0-1.43.amzn1.i686
    nginx-mod-http-xslt-filter-1.18.0-1.43.amzn1.i686
    nginx-1.18.0-1.43.amzn1.i686
    nginx-all-modules-1.18.0-1.43.amzn1.i686
    nginx-mod-http-geoip-1.18.0-1.43.amzn1.i686

src:
    nginx-1.18.0-1.43.amzn1.src

x86_64:
    nginx-1.18.0-1.43.amzn1.x86_64
    nginx-mod-http-image-filter-1.18.0-1.43.amzn1.x86_64
    nginx-debuginfo-1.18.0-1.43.amzn1.x86_64
    nginx-mod-http-perl-1.18.0-1.43.amzn1.x86_64
    nginx-mod-http-xslt-filter-1.18.0-1.43.amzn1.x86_64
    nginx-mod-stream-1.18.0-1.43.amzn1.x86_64
    nginx-mod-mail-1.18.0-1.43.amzn1.x86_64
    nginx-mod-http-geoip-1.18.0-1.43.amzn1.x86_64
    nginx-all-modules-1.18.0-1.43.amzn1.x86_64