ALAS2-2020-1506

Amazon Linux 2 Security Advisory: ALAS-2020-1506
Advisory Release Date: 2020-10-22 17:24 Pacific
Advisory Updated Date: 2020-10-22 22:39 Pacific
Severity: Medium
Issue Overview:

A localhost.localdomain whitelist entry in valid_host() in scheduler/client.c in CUPS before 2.2.2 allows remote attackers to execute arbitrary IPP commands by sending POST requests to the CUPS daemon in conjunction with DNS rebinding. The localhost.localdomain name is often resolved via a DNS server (neither the OS nor the web browser is responsible for ensuring that localhost.localdomain is 127.0.0.1). (CVE-2017-18190)

Stack-buffer-overflow in libcups's asn1_get_type function. (CVE-2019-8675)

Stack-buffer-overflow in libcups's asn1_get_packed function. (CVE-2019-8696)


Affected Packages:

cups


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 cups to update your system.

New Packages:
aarch64:
    cups-1.6.3-51.amzn2.aarch64
    cups-client-1.6.3-51.amzn2.aarch64
    cups-devel-1.6.3-51.amzn2.aarch64
    cups-libs-1.6.3-51.amzn2.aarch64
    cups-lpd-1.6.3-51.amzn2.aarch64
    cups-ipptool-1.6.3-51.amzn2.aarch64
    cups-debuginfo-1.6.3-51.amzn2.aarch64

i686:
    cups-1.6.3-51.amzn2.i686
    cups-client-1.6.3-51.amzn2.i686
    cups-devel-1.6.3-51.amzn2.i686
    cups-libs-1.6.3-51.amzn2.i686
    cups-lpd-1.6.3-51.amzn2.i686
    cups-ipptool-1.6.3-51.amzn2.i686
    cups-debuginfo-1.6.3-51.amzn2.i686

noarch:
    cups-filesystem-1.6.3-51.amzn2.noarch

src:
    cups-1.6.3-51.amzn2.src

x86_64:
    cups-1.6.3-51.amzn2.x86_64
    cups-client-1.6.3-51.amzn2.x86_64
    cups-devel-1.6.3-51.amzn2.x86_64
    cups-libs-1.6.3-51.amzn2.x86_64
    cups-lpd-1.6.3-51.amzn2.x86_64
    cups-ipptool-1.6.3-51.amzn2.x86_64
    cups-debuginfo-1.6.3-51.amzn2.x86_64

Additional References

Red Hat: CVE-2017-18190, CVE-2019-8675, CVE-2019-8696

Mitre: CVE-2017-18190, CVE-2019-8675, CVE-2019-8696