Login
Newsletter
Werbung

Sicherheit: Mehrere Probleme in eglibc
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in eglibc
ID: DSA-3480-1
Distribution: Debian
Plattformen: Debian wheezy
Datum: Di, 16. Februar 2016, 18:52
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8779
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8121
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8777
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8776
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8778
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1781
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7547
Applikationen: GNU C library

Originalnachricht

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3480-1 security@debian.org
https://www.debian.org/security/ Florian Weimer
February 16, 2016 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : eglibc
CVE ID : CVE-2014-8121 CVE-2015-1781 CVE-2015-7547 CVE-2015-8776
CVE-2015-8777 CVE-2015-8778 CVE-2015-8779
Debian Bug : 779587 796105 798316 801691 803927 812441 812445 812455

Several vulnerabilities have been fixed in the GNU C Library, eglibc.

The CVE-2015-7547 vulnerability listed below is considered to have
critical impact.

CVE-2014-8121

Robin Hack discovered that the nss_files database did not
correctly implement enumeration interleaved with name-based or
ID-based lookups. This could cause the enumeration enter an
endless loop, leading to a denial of service.

CVE-2015-1781

Arjun Shankar discovered that the _r variants of host name
resolution functions (like gethostbyname_r), when performing DNS
name resolution, suffered from a buffer overflow if a misaligned
buffer was supplied by the applications, leading to a crash or,
potentially, arbitrary code execution. Most applications are not
affected by this vulnerability because they use aligned buffers.

CVE-2015-7547

The Google Security Team and Red Hat discovered that the eglibc
host name resolver function, getaddrinfo, when processing
AF_UNSPEC queries (for dual A/AAAA lookups), could mismanage its
internal buffers, leading to a stack-based buffer overflow and
arbitrary code execution. This vulnerability affects most
applications which perform host name resolution using getaddrinfo,
including system services.

CVE-2015-8776

Adam Nielsen discovered that if an invalid separated time value
is passed to strftime, the strftime function could crash or leak
information. Applications normally pass only valid time
information to strftime; no affected applications are known.

CVE-2015-8777

Hector Marco-Gisbert reported that LD_POINTER_GUARD was not
ignored for SUID programs, enabling an unintended bypass of a
security feature. This update causes eglibc to always ignore the
LD_POINTER_GUARD environment variable.

CVE-2015-8778

Szabolcs Nagy reported that the rarely-used hcreate and hcreate_r
functions did not check the size argument properly, leading to a
crash (denial of service) for certain arguments. No impacted
applications are known at this time.

CVE-2015-8779

The catopen function contains several unbound stack allocations
(stack overflows), causing it the crash the process (denial of
service). No applications where this issue has a security impact
are currently known.

The following fixed vulnerabilities currently lack CVE assignment:

Joseph Myers reported discovered that an integer overflow in the
strxfrm can lead to heap-based buffer overflow, possibly allowing
arbitrary code execution. In addition, a fallback path in strxfrm
uses an unbounded stack allocation (stack overflow), leading to a
crash or erroneous application behavior.

Kostya Serebryany reported that the fnmatch function could skip
over the terminating NUL character of a malformed pattern, causing
an application calling fnmatch to crash (denial of service).

Joseph Myers reported that the IO_wstr_overflow function,
internally used by wide-oriented character streams, suffered from
an integer overflow, leading to a heap-based buffer overflow. On
GNU/Linux systems, wide-oriented character streams are rarely
used, and no affected applications are known.

Andreas Schwab reported a memory leak (memory allocation without a
matching deallocation) while processing certain DNS answers in
getaddrinfo, related to the _nss_dns_gethostbyname4_r function.
This vulnerability could lead to a denial of service.

While it is only necessary to ensure that all processes are not using
the old eglibc anymore, it is recommended to reboot the machines after
applying the security upgrade.

For the oldstable distribution (wheezy), these problems have been fixed
in version 2.13-38+deb7u10.

We recommend that you upgrade your eglibc packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=K3Zo
-----END PGP SIGNATURE-----
Pro-Linux
Pro-Linux @Facebook
Neue Nachrichten
Werbung