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Sicherheit: Mehrere Probleme in GNU C library (Aktualisierung)
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in GNU C library (Aktualisierung)
ID: USN-3239-2
Distribution: Ubuntu
Plattformen: Ubuntu 12.04 LTS, Ubuntu 14.04 LTS, Ubuntu 16.04 LTS
Datum: Mi, 22. März 2017, 07:17
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3706
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1234
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8984
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5180
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5417
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4429
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8983
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6323
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8982
Update von: Mehrere Probleme in GNU C library

Originalnachricht


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==========================================================================
Ubuntu Security Notice USN-3239-2
March 21, 2017

eglibc, glibc regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

USN-3239-1 introduced a regression in the GNU C Library.

Software Description:
- glibc: GNU C Library
- eglibc: GNU C Library

Details:

USN-3239-1 fixed vulnerabilities in the GNU C Library. Unfortunately,
the fix for CVE-2015-5180 introduced an internal ABI change within
the resolver library. This update reverts the change. We apologize
for the inconvenience.

Please note that long-running services that were restarted to compensate
for the USN-3239-1 update may need to be restarted again.

Original advisory details:

It was discovered that the GNU C Library incorrectly handled the
strxfrm() function. An attacker could use this issue to cause a denial
of service or possibly execute arbitrary code. This issue only affected
Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-8982)

It was discovered that an integer overflow existed in the
_IO_wstr_overflow() function of the GNU C Library. An attacker could
use this to cause a denial of service or possibly execute arbitrary
code. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04
LTS. (CVE-2015-8983)

It was discovered that the fnmatch() function in the GNU C Library
did not properly handle certain malformed patterns. An attacker could
use this to cause a denial of service. This issue only affected Ubuntu
12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-8984)

Alexander Cherepanov discovered a stack-based buffer overflow in the
glob implementation of the GNU C Library. An attacker could use this
to specially craft a directory layout and cause a denial of service.
(CVE-2016-1234)

Florian Weimer discovered a NULL pointer dereference in the DNS
resolver of the GNU C Library. An attacker could use this to cause
a denial of service. (CVE-2015-5180)

Michael Petlan discovered an unbounded stack allocation in the
getaddrinfo() function of the GNU C Library. An attacker could use
this to cause a denial of service. (CVE-2016-3706)

Aldy Hernandez discovered an unbounded stack allocation in the sunrpc
implementation in the GNU C Library. An attacker could use this to
cause a denial of service. (CVE-2016-4429)

Tim Ruehsen discovered that the getaddrinfo() implementation in the
GNU C Library did not properly track memory allocations. An attacker
could use this to cause a denial of service. This issue only affected
Ubuntu 16.04 LTS. (CVE-2016-5417)

Andreas Schwab discovered that the GNU C Library on ARM 32-bit
platforms did not properly set up execution contexts. An attacker
could use this to cause a denial of service. (CVE-2016-6323)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
libc6 2.23-0ubuntu7

Ubuntu 14.04 LTS:
libc6 2.19-0ubuntu6.11

Ubuntu 12.04 LTS:
libc6 2.15-0ubuntu10.17

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3239-2
http://www.ubuntu.com/usn/usn-3239-1
https://bugs.launchpad.net/bugs/1674532

Package Information:
https://launchpad.net/ubuntu/+source/glibc/2.23-0ubuntu7
https://launchpad.net/ubuntu/+source/eglibc/2.19-0ubuntu6.11
https://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.17


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