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Red Hat Product Errata RHSA-2017:1567 - Security Advisory
Issued:
2017-06-21
Updated:
2017-06-21

RHSA-2017:1567 - Security Advisory

  • Overview

Synopsis

Important: Red Hat Container Development Kit 3.0.0 security update

Type/Severity

Security Advisory: Important

Topic

An update is now available for Red Hat Container Development Kit 3.0.0.

Red Hat Product Security has rated this update as having a security impact of Important. 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

Red Hat Container Development Kit is a platform for developing containerized applications — it is a set of tools that enables developers to quickly and easily set up an environment for developing and testing containerized applications on the Red Hat Enterprise Linux platform.

With this update, Container Development Kit has been updated to 3.0.0-2, which includes an updated Red Hat Enterprise Linux ISO that contains fixes for the following security issues.

Security Fix(es):

  • A null pointer dereference flaw was found in the way NSS handled empty SSLv2 messages. An attacker could use this flaw to crash a server application compiled against the NSS library. (CVE-2017-7502)
  • A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult. (CVE-2017-1000364)
  • A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap (or different memory region) and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is glibc-side mitigation which blocks processing of LD_LIBRARY_PATH for programs running in secure-execution mode and reduces the number of allocations performed by the processing of LD_AUDIT, LD_PRELOAD, and LD_HWCAP_MASK, making successful exploitation of this issue more difficult. (CVE-2017-1000366)

Red Hat would like to thank Qualys Research Labs for reporting CVE-2017-1000364 and CVE-2017-1000366.

Solution

The References section of this erratum contains a link to download CDK 3.0.0-2 (you must log in to download the update).

Affected Products

  • Red Hat Container Development Kit 3.0 x86_64

Fixes

  • BZ - 1446631 - CVE-2017-7502 nss: Null pointer dereference when handling empty SSLv2 messages
  • BZ - 1452543 - CVE-2017-1000366 glibc: heap/stack gap jumping via unbounded stack allocations
  • BZ - 1461333 - CVE-2017-1000364 kernel: heap/stack gap jumping via unbounded stack allocations

CVEs

  • CVE-2017-1000364
  • CVE-2017-1000366
  • CVE-2017-7502

References

  • https://access.redhat.com/security/updates/classification/#important
  • https://access.redhat.com/downloads/content/293/

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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