ALAS2-2020-1571

Amazon Linux 2 Security Advisory: ALAS-2020-1571
Advisory Release Date: 2020-12-08 21:30 Pacific
Advisory Updated Date: 2020-12-08 22:38 Pacific
Severity: Important
Issue Overview:

A flaw was found in X.Org Server. An Out-Of-Bounds access in XkbSetNames function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-14345)

A flaw was found in xorg-x11-server. A integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-14346)

A flaw was found in X.Org Server. An Integer underflow leading to heap-buffer overflow may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-14361)

A flaw was found in X.Org Server. An Integer underflow leading to heap-buffer overflow may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2020-14362)


Affected Packages:

xorg-x11-server


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 xorg-x11-server to update your system.

New Packages:
aarch64:
    xorg-x11-server-common-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xorg-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xnest-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xdmx-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xvfb-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xephyr-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-Xwayland-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-devel-1.20.4-12.amzn2.0.1.aarch64
    xorg-x11-server-debuginfo-1.20.4-12.amzn2.0.1.aarch64

i686:
    xorg-x11-server-common-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xorg-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xnest-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xdmx-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xvfb-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xephyr-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-Xwayland-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-devel-1.20.4-12.amzn2.0.1.i686
    xorg-x11-server-debuginfo-1.20.4-12.amzn2.0.1.i686

noarch:
    xorg-x11-server-source-1.20.4-12.amzn2.0.1.noarch

src:
    xorg-x11-server-1.20.4-12.amzn2.0.1.src

x86_64:
    xorg-x11-server-common-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xorg-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xnest-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xdmx-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xvfb-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xephyr-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-Xwayland-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-devel-1.20.4-12.amzn2.0.1.x86_64
    xorg-x11-server-debuginfo-1.20.4-12.amzn2.0.1.x86_64

Additional References

Red Hat: CVE-2020-14345, CVE-2020-14346, CVE-2020-14361, CVE-2020-14362

Mitre: CVE-2020-14345, CVE-2020-14346, CVE-2020-14361, CVE-2020-14362