ld.so fails to unset LD_PRELOAD before executing suid root programs

Overview ld.so fails to unset LDPRELOAD before executing suid root programs, allowing loading of insecure or malicious libraries. Description ld.so, the UNIX/LINUX dynamic loader, fails in some conditions and some operating system releases to unset LDPRELOAD before loading suid root programs for...

glibc does not check SUID bit on libraries in /etc/ld.so.cache

Overview The GNU libc library fails to perform a check for the SETUID bit for cached libraries in the /etc/ld.so.cache file. As a result, malicious users may create or modify privileged files. Description The GNU libc library allows preloading libraries via the LDPRELOAD environment variable,...

CVE-2001-0169

CVE-2001-0169 : The GNU C Library (glibc) fails to verify that libraries loaded via LD_PRELOAD into SUID/SGID processes are also non-SUID/non-SGID when they come from /etc/ld.so.cache, enabling a local user to pre-load a library from /lib or /usr/lib and overwrite privileged files. Documented in ...

CVE-2001-0169

When using the LDPRELOAD environmental variable in SUID or SGID applications, glibc does not verify that preloaded libraries in /etc/ld.so.cache are also SUID/SGID, which could allow a local user to overwrite arbitrary files by loading a library from /lib or /usr/lib...

CVE-2001-0169: Undefined Security Weakness

When using the LDPRELOAD environmental variable in SUID or SGID applications, glibc does not verify that preloaded libraries in /etc/ld.so.cache are also SUID/SGID, which could allow a local user to overwrite arbitrary files by loading a library from /lib or /usr/lib...

CVE-2001-0169

When using the LDPRELOAD environmental variable in SUID or SGID applications, glibc does not verify that preloaded libraries in /etc/ld.so.cache are also SUID/SGID, which could allow a local user to overwrite arbitrary files by loading a library from /lib or /usr/lib...

[SECURITY] [DSA-039-1] glibc local file overwrite problems

Package : glibc Problem type : local file overwrite Debian-specific: no The version of GNU libc that was distributed with Debian GNU/Linux 2.2 suffered from 2 security problems: It was possible to use LDPRELOAD to load libraries that are listed in /etc/ld.so.cache, even for suid programs. This...

GLIBC 2.1.3 - 'LD_PRELOAD' Local Privilege Escalation

!/bin/tcsh przyklad wykorzystania dziury w LDPRELOAD shadow tested on redhat 6.0, should work on others if -e /etc/initscript echo uwaga: /etc/initscript istnieje cd /lib umask 0 setenv LDPRELOAD libSegFault.so setenv SEGFAULTOUTPUTNAME /etc/initscript echo czekaj... to moze chwile potrwac... whi...

GLIBC 2.1.3 - LD_PRELOAD Local Privilege Escalation

GLIBC 2.1.3 - LDPRELOAD Local Privilege Escalation !/bin/tcsh przyklad wykorzystania dziury w LDPRELOAD shadow tested on redhat 6.0, should work on others if -e /etc/initscript echo uwaga: /etc/initscript istnieje cd /lib umask 0 setenv LDPRELOAD libSegFault.so setenv SEGFAULTOUTPUTNAME...

GLIBC 2.1.3 ld_preload Local Exploit

Exploit for linux platform in category local exploits ==================================== GLIBC 2.1.3 ldpreload Local Exploit ==================================== !/bin/tcsh przyklad wykorzystania dziury w LDPRELOAD shadow tested on redhat 6.0, should work on others if -e /etc/initscript echo...

CVE-2000-0824: Undefined Security Weakness

The unsetenv function in glibc 2.1.1 does not properly unset an environmental variable if the variable is provided twice to a program, which could allow local users to execute arbitrary commands in setuid programs by specifying their own duplicate environmental variables such as LDPRELOAD or...

Проблема с ld.so из glibc

Переменная окружения LDPRELOAD используется для поиска динамических библиотек. При вызове suid/sgid программы эта переменная сбрасывается, но не сбрасывается, когда suid/sgid вызывает другое приложение, что позволяет подсунуть пользовательскую библиотеку...

processdump.txt

Date: Tue, 15 Sep 1998 12:36:22 +0800 From: David Luyer Subject: Dump a mode --x--x--x binary on Linux 2.0.x The following file can be LDPRELOAD'ed against a mode 111 --x--x--x binary on Linux 2.0.x. It will dump the binary to a series of process-dump-... files in the current directory. The...