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Home » Hacking News » Red Hat - RHSA-2001:160-09

Red Hat - RHSA-2001:160-09

by Nikola Strahija on December 16th, 2001 An overflowable buffer exists in earlier versions of glibc glob(3) implementation. It may be possible to exploit programs that pass user modifiable input to the glibc glob function.

Red Hat, Inc. Red Hat Security Advisory

Synopsis: Updated glibc packages are available
Advisory ID: RHSA-2001:160-09
Issue date: 2001-11-28
Updated on: 2001-12-14
Product: Red Hat Linux
Keywords: glibc glob buffer overrun DT_RUNPATH LD_LIBRARY_PATH strndup
Cross references:

1. Topic:

Updated glibc packages are available to fix an overflowable buffer
and for 7.x to fix a couple of non-security related bugs.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - alpha, i386, i686, sparc, sparcv9

Red Hat Linux 7.0 - alpha, alphaev6, i386, i686

Red Hat Linux 7.1 - alpha, alphaev6, i386, i686, ia64

Red Hat Linux 7.2 - i386, i686

3. Problem description:

An overflowable buffer exists in earlier versions of glibc glob(3)
implementation. It may be possible to
exploit programs that pass user modifiable input to the glibc glob

The Common Vulnerabilities and Exposures project ( has
assigned the name CAN-2001-0886 to this issue.

This errata also fixes a couple of non-security related bugs
in glibc packages for Red Hat Linux 7.x.
There was a bug in the dynamic linker which caused DT_RUNPATH dynamic
tags (e.g. created by GNU ld with --enable-new-dtags -rpath DIR options)
to behave the same way as mere DT_RPATH tag, ie. search paths in it
couldn't be overridden by LD_LIBRARY_PATH environment variable;
this is fixed in the updated packages, as well as a strndup bug
when strndup was used with string literal argument and a typo in

It is recommended that all users upgrade to provided packages.

We'd like to thank Flavio Veloso for discovering
this buffer overflow problem.

4. Solution:

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed ( for more info):

55865 - LD_LIBRARY_PATH / rpath interaction
57268 - syntax error in inttypes.h with 2.2.4-19 update

6. RPMs required:

Red Hat Linux 6.2:






Red Hat Linux 7.0:






Red Hat Linux 7.1:







Red Hat Linux 7.2:




7. Verification:

MD5 sum Package Name
c357416249d75bdc045f6a0bd375d38e 6.2/en/os/SRPMS/glibc-2.1.3-23.src.rpm
1488ff1e3bd4505ebad71e9eadc6cfe3 6.2/en/os/alpha/glibc-2.1.3-23.alpha.rpm
ccf5c9dd4c68eaae2f7661bce814a686 6.2/en/os/alpha/glibc-devel-2.1.3-23.alpha.rpm
87e6ba6d7600a3b3fd35e106745fa788 6.2/en/os/alpha/glibc-profile-2.1.3-23.alpha.rpm
a8679c548f4de4c413720b88231b79ea 6.2/en/os/alpha/nscd-2.1.3-23.alpha.rpm
3e8cba807ffdce5579114bb2f3fbbdfd 6.2/en/os/i386/glibc-2.1.3-23.i386.rpm
aa3c90d7d4cedfd4ebf45a44312fd3a2 6.2/en/os/i386/glibc-devel-2.1.3-23.i386.rpm
07197b46d6f567131b43330bcc59b28f 6.2/en/os/i386/glibc-profile-2.1.3-23.i386.rpm
ec8527e6b9924ce9e8a5824d1983a606 6.2/en/os/i386/nscd-2.1.3-23.i386.rpm
6e3523c567b724d6875b05d48a8781e1 6.2/en/os/sparc/glibc-2.1.3-23.sparc.rpm
9435475af4f944accc5c33119f4bebe1 6.2/en/os/sparc/glibc-devel-2.1.3-23.sparc.rpm
b12cb08aaed71abab6c8b8eaa2b41072 6.2/en/os/sparc/glibc-profile-2.1.3-23.sparc.rpm
b124928f89fb1a46cff833056d44dd79 6.2/en/os/sparc/nscd-2.1.3-23.sparc.rpm
907c6bdf5a8dd1c4f2803f6d8f3a0ae3 6.2/en/os/sparcv9/glibc-2.1.3-23.sparcv9.rpm
ae84cff41c783ea0b75f083870a756f4 7.0/en/os/SRPMS/glibc-2.2.4-
f1c2cca381e329afcb9f580b3b889363 7.0/en/os/alpha/glibc-2.2.4-
2076d9b49459b1b9d51a71ca6c1f7f6a 7.0/en/os/alpha/glibc-common-2.2.4-
f375a5b1b44110fb0fee04b69b6f2c63 7.0/en/os/alpha/glibc-devel-2.2.4-
8f2430025f19cec38df29f673cd9b7bb 7.0/en/os/alpha/glibc-profile-2.2.4-
1bfd015bc33811a1c6ad08f57d1bac29 7.0/en/os/alpha/nscd-2.2.4-
dcbfacca113f7ea4d3d7c75baac8d0fb 7.0/en/os/alphaev6/glibc-2.2.4-
05bb9c3de55e04b8fca48d3508c99d03 7.0/en/os/i386/glibc-2.2.4-
b4269c4c1c5e48166068a691cd0fd968 7.0/en/os/i386/glibc-common-2.2.4-
e46be81d1912d78ea5a1e9db63623fe6 7.0/en/os/i386/glibc-devel-2.2.4-
fedfe5e3d2cdbeef9eb616fbe215cb96 7.0/en/os/i386/glibc-profile-2.2.4-
dff1ecb55acef7be12cffa5c45b725b1 7.0/en/os/i386/nscd-2.2.4-
2cda97a74018abad487b749923607cee 7.0/en/os/i686/glibc-2.2.4-
1ab748bd3fe04702751b7633b98a315d 7.1/en/os/SRPMS/glibc-2.2.4-19.3.src.rpm
3e2faca6f40e6167f88eea85eac58940 7.1/en/os/alpha/glibc-2.2.4-19.3.alpha.rpm
56538cf7a756228a90f25abd85774228 7.1/en/os/alpha/glibc-common-2.2.4-19.3.alpha.rpm
b5a3914236dc76181d4f1b417fcb08f2 7.1/en/os/alpha/glibc-devel-2.2.4-19.3.alpha.rpm
11ddc075098bd3cd3953d86658250620 7.1/en/os/alpha/glibc-profile-2.2.4-19.3.alpha.rpm
b4c02b68cf7a98376707e11a665e8057 7.1/en/os/alpha/nscd-2.2.4-19.3.alpha.rpm
0c74520246ae0f5b1ccacfcd65223feb 7.1/en/os/alphaev6/glibc-2.2.4-19.3.alphaev6.rpm
9ece40bc4b5a2fb8734c7807b28b86a4 7.1/en/os/i386/glibc-2.2.4-19.3.i386.rpm
8b9c9635214c475b6fd6c7e5dab3d3c0 7.1/en/os/i386/glibc-common-2.2.4-19.3.i386.rpm
78ddc49ad3cbb1f769d61f2357466d8d 7.1/en/os/i386/glibc-devel-2.2.4-19.3.i386.rpm
e53b1f547dd67c86aa2cf969f54ff015 7.1/en/os/i386/glibc-profile-2.2.4-19.3.i386.rpm
ce89d05dad8b1278d3a753676b96e5aa 7.1/en/os/i386/nscd-2.2.4-19.3.i386.rpm
1dfabf932afb04048d12622e6fc6859f 7.1/en/os/i686/glibc-2.2.4-19.3.i686.rpm
24cb3c3be8b8b50c709f5dfd593f2b0a 7.1/en/os/ia64/glibc-2.2.4-19.3.ia64.rpm
330ec0f05b6d2e83c4c57dcad9c513de 7.1/en/os/ia64/glibc-common-2.2.4-19.3.ia64.rpm
5bf8a4da1d8e34b79c4bdc953d610467 7.1/en/os/ia64/glibc-devel-2.2.4-19.3.ia64.rpm
5163bf8fa2897e653c93a9234a0d39b8 7.1/en/os/ia64/glibc-profile-2.2.4-19.3.ia64.rpm
64a273fa127fbd09f7f3a30b00390972 7.1/en/os/ia64/nscd-2.2.4-19.3.ia64.rpm
1ab748bd3fe04702751b7633b98a315d 7.2/en/os/SRPMS/glibc-2.2.4-19.3.src.rpm
9ece40bc4b5a2fb8734c7807b28b86a4 7.2/en/os/i386/glibc-2.2.4-19.3.i386.rpm
8b9c9635214c475b6fd6c7e5dab3d3c0 7.2/en/os/i386/glibc-common-2.2.4-19.3.i386.rpm
78ddc49ad3cbb1f769d61f2357466d8d 7.2/en/os/i386/glibc-devel-2.2.4-19.3.i386.rpm
e53b1f547dd67c86aa2cf969f54ff015 7.2/en/os/i386/glibc-profile-2.2.4-19.3.i386.rpm
ce89d05dad8b1278d3a753676b96e5aa 7.2/en/os/i386/nscd-2.2.4-19.3.i386.rpm
1dfabf932afb04048d12622e6fc6859f 7.2/en/os/i686/glibc-2.2.4-19.3.i686.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:

You can verify each package with the following command:
rpm --checksig

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
rpm --checksig --nogpg

8. References:

Copyright(c) 2000, 2001 Red Hat, Inc.

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