RHSA-2015:1210 - Security Advisory

Topic

Updated abrt packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

ABRT (Automatic Bug Reporting Tool) is a tool to help users to detect
defects in applications and to create a bug report with all the information
needed by a maintainer to fix it. It uses a plug-in system to extend its
functionality.

It was found that ABRT was vulnerable to multiple race condition and
symbolic link flaws. A local attacker could use these flaws to potentially
escalate their privileges on the system. (CVE-2015-3315)

It was discovered that the kernel-invoked coredump processor provided by
ABRT wrote core dumps to files owned by other system users. This could
result in information disclosure if an application crashed while its
current directory was a directory writable to by other users (such as
/tmp). (CVE-2015-3142)

It was discovered that the default event handling scripts installed by ABRT
did not handle symbolic links correctly. A local attacker with write access
to an ABRT problem directory could use this flaw to escalate their
privileges. (CVE-2015-1869)

It was found that the ABRT event scripts created a user-readable copy of an
sosreport file in ABRT problem directories, and included excerpts of
/var/log/messages selected by the user-controlled process name, leading to
an information disclosure. (CVE-2015-1870)

It was discovered that, when moving problem reports between certain
directories, abrt-handle-upload did not verify that the new problem
directory had appropriate permissions and did not contain symbolic links.
An attacker able to create a crafted problem report could use this flaw to
expose other parts of ABRT, or to overwrite arbitrary files on the system.
(CVE-2015-3147)

It was discovered that the abrt-action-install-debuginfo-to-abrt-cache
helper program did not properly filter the process environment before
invoking abrt-action-install-debuginfo. A local attacker could use this
flaw to escalate their privileges on the system. (CVE-2015-3159)

The CVE-2015-1869, CVE-2015-1870, CVE-2015-3142, CVE-2015-3147, and
CVE-2015-3159 issues were discovered by Florian Weimer of Red Hat
Product Security.

All users of abrt are advised to upgrade to these updated packages, which
correct these issues.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.6 i386
• Red Hat Enterprise Linux Server - AUS 6.6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - TUS 6.6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.6 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.6 i386
• Red Hat Enterprise Linux EUS Compute Node 6.6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 1211835 - CVE-2015-3315 abrt: Various race-conditions and symlink issues found in abrt
• BZ - 1212818 - CVE-2015-3142 abrt: abrt-hook-ccpp writes core dumps to existing files owned by others
• BZ - 1212861 - CVE-2015-1869 abrt: default event scripts follow symbolic links
• BZ - 1212868 - CVE-2015-1870 abrt: default abrt event scripts lead to information disclosure
• BZ - 1212953 - CVE-2015-3147 abrt: does not validate contents of uploaded problem reports
• BZ - 1216962 - CVE-2015-3159 abrt: missing process environment sanitizaton in abrt-action-install-debuginfo-to-abrt-cache

CVEs

• CVE-2015-3315
• CVE-2015-1870
• CVE-2015-3142
• CVE-2015-1869
• CVE-2015-3147
• CVE-2015-3159

References

• https://access.redhat.com/security/updates/classification/#moderate