Debian Security Advisory

DSA-039-1 glibc -- local file overwrite

Date Reported:

08 Mar 2001

Affected Packages:

glibc

Vulnerable:

Yes

Security database references:

In the Bugtraq database (at SecurityFocus): BugTraq ID 2223.
In Mitre's CVE dictionary: CVE-2001-0169.

More information:

The version of GNU libc that was distributed with Debian GNU/Linux 2.2 suffered from 2 security problems:

It was possible to use LD_PRELOAD to load libraries that are listed in /etc/ld.so.cache, even for suid programs. This could be used to create (and overwrite) files which a user should not be allowed to.
By using LD_PROFILE suid programs would write data to a file to /var/tmp, which was not done safely. Again, this could be used to create (and overwrite) files which a user should not have access to.

Both problems have been fixed in version 2.1.3-17 and we recommend that you upgrade your glibc packages immediately.

Please note that a side-effect of this upgrade is that ldd will no longer work on suid programs, unless you logged in as root.

Fixed in:

Debian 2.2 (potato)

Source:: http://security.debian.org/dists/stable/updates/main/source/glibc_2.1.3-17.diff.gz; http://security.debian.org/dists/stable/updates/main/source/glibc_2.1.3-17.dsc; http://security.debian.org/dists/stable/updates/main/source/glibc_2.1.3.orig.tar.gz
Architecture-independent component:: http://security.debian.org/dists/stable/updates/main/binary-all/glibc-doc_2.1.3-17_all.deb; http://security.debian.org/dists/stable/updates/main/binary-all/i18ndata_2.1.3-17_all.deb
alpha:: http://security.debian.org/dists/stable/updates/main/binary-alpha/libc6.1-dbg_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/libc6.1-dev_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/libc6.1-pic_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/libc6.1-prof_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/libc6.1_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/libnss1-compat_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/locales_2.1.3-17_alpha.deb; http://security.debian.org/dists/stable/updates/main/binary-alpha/nscd_2.1.3-17_alpha.deb
arm:: http://security.debian.org/dists/stable/updates/main/binary-arm/libc6-dbg_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/libc6-dev_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/libc6-pic_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/libc6-prof_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/libc6_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/libnss1-compat_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/locales_2.1.3-17_arm.deb; http://security.debian.org/dists/stable/updates/main/binary-arm/nscd_2.1.3-17_arm.deb
i386:: http://security.debian.org/dists/stable/updates/main/binary-i386/libc6-dbg_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/libc6-dev_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/libc6-pic_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/libc6-prof_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/libc6_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/libnss1-compat_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/locales_2.1.3-17_i386.deb; http://security.debian.org/dists/stable/updates/main/binary-i386/nscd_2.1.3-17_i386.deb
m68k:: http://security.debian.org/dists/stable/updates/main/binary-m68k/libc6-dbg_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/libc6-dev_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/libc6-pic_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/libc6-prof_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/libc6_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/libnss1-compat_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/locales_2.1.3-17_m68k.deb; http://security.debian.org/dists/stable/updates/main/binary-m68k/nscd_2.1.3-17_m68k.deb
powerpc:: http://security.debian.org/dists/stable/updates/main/binary-powerpc/libc6-dbg_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/libc6-dev_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/libc6-pic_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/libc6-prof_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/libc6_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/libnss1-compat_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/locales_2.1.3-17_powerpc.deb; http://security.debian.org/dists/stable/updates/main/binary-powerpc/nscd_2.1.3-17_powerpc.deb
sparc:: http://security.debian.org/dists/stable/updates/main/binary-sparc/libc6-dbg_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/libc6-dev_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/libc6-pic_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/libc6-prof_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/libc6_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/libnss1-compat_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/locales_2.1.3-17_sparc.deb; http://security.debian.org/dists/stable/updates/main/binary-sparc/nscd_2.1.3-17_sparc.deb