RHSA-2019:2125 - Security Advisory

Topic

An update for ovmf is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OVMF (Open Virtual Machine Firmware) is a project to enable UEFI support for Virtual Machines. This package contains a sample 64-bit UEFI firmware for QEMU and KVM.

Security Fix(es):

• edk2: Privilege escalation via processing of malformed files in TianoCompress.c (CVE-2017-5731)
• edk2: Privilege escalation via processing of malformed files in BaseUefiDecompressLib.c (CVE-2017-5732)
• edk2: Privilege escalation via heap-based buffer overflow in MakeTable() function (CVE-2017-5733)
• edk2: Privilege escalation via stack-based buffer overflow in MakeTable() function (CVE-2017-5734)
• edk2: Privilege escalation via heap-based buffer overflow in Decode() function (CVE-2017-5735)
• edk2: Logic error in MdeModulePkg in EDK II firmware allows for privilege escalation by authenticated users (CVE-2018-3613)
• openssl: Side-channel vulnerability on SMT/Hyper-Threading architectures (PortSmash) (CVE-2018-5407)
• edk2: Stack buffer overflow with corrupted BMP (CVE-2018-12181)
• edk2: buffer overflows in PartitionDxe and UdfDxe with long file names and invalid UDF media (CVE-2019-0160)
• edk2: stack overflow in XHCI causing denial of service (CVE-2019-0161)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64

Fixes

• BZ - 1641433 - CVE-2018-3613 edk2: Logic error in MdeModulePkg in EDK II firmware allows for privilege escalation by authenticated users
• BZ - 1641442 - CVE-2017-5731 edk2: Privilege escalation via processing of malformed files in TianoCompress.c
• BZ - 1641446 - CVE-2017-5732 edk2: Privilege escalation via processing of malformed files in BaseUefiDecompressLib.c
• BZ - 1641450 - CVE-2017-5733 edk2: Privilege escalation via heap-based buffer overflow in MakeTable() function
• BZ - 1641458 - CVE-2017-5734 edk2: Privilege escalation via stack-based buffer overflow in MakeTable() function
• BZ - 1641465 - CVE-2017-5735 edk2: Privilege escalation via heap-based buffer overflow in Decode() function
• BZ - 1645695 - CVE-2018-5407 openssl: Side-channel vulnerability on SMT/Hyper-Threading architectures (PortSmash)
• BZ - 1686783 - CVE-2018-12181 edk2: Stack buffer overflow with corrupted BMP
• BZ - 1691640 - CVE-2019-0160 edk2: buffer overflows in PartitionDxe and UdfDxe with long file names and invalid UDF media
• BZ - 1694065 - CVE-2019-0161 edk2: stack overflow in XHCI causing denial of service

CVEs

• CVE-2017-5731
• CVE-2017-5732
• CVE-2017-5733
• CVE-2017-5734
• CVE-2017-5735
• CVE-2018-3613
• CVE-2018-5407
• CVE-2018-12181
• CVE-2019-0160
• CVE-2019-0161

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index