Analyzing ASLR in Android Ice Cream Sandwich 4.0

When I first saw the release notes for the new Android Ice Cream Sandwich ICS platform, I was excited to see that Google mentioned that “Android 4.0 now provides address space layout randomization”. For the uninitiated, ASLR randomizes where various areas of memory eg. stack, heap, libs, etc are...

glibc: ld.so d_tag signedness error in elf_get_dynamic_info

Integer signedness error in the elfgetdynamicinfo function in elf/dynamic-link.h in ld.so in the GNU C Library aka glibc or libc6 2.0.1 through 2.11.1, when the --verify option is used, allows user-assisted remote attackers to execute arbitrary code via a crafted ELF program with a negative value...

glibc - LD_AUDIT Arbitrary DSO Load Privilege Escalation

glibc - LDAUDIT Arbitrary DSO Load Privilege Escalation !/bin/sh I Can't Read and I Won't Race You Either by zx2c4 This is an exploit for CVE-2010-3856. A while back, Tavis showed us three ways to exploit flaws in glibc's dynamic linker involving LDAUDIT. 1 2 The first way involved opening a file...

glibc - 'LD_AUDIT' Arbitrary DSO Load Privilege Escalation

!/bin/sh I Can't Read and I Won't Race You Either by zx2c4 This is an exploit for CVE-2010-3856. A while back, Tavis showed us three ways to exploit flaws in glibc's dynamic linker involving LDAUDIT. 1 2 The first way involved opening a file descriptor and using fexecve to easily win a race with...

CVE-2011-4060

The runtime linker in QNX Neutrino RTOS 6.5.0 before Service Pack 1 does not properly clear the LDDEBUGOUTPUT and LDDEBUG environment variables when a program is spawned from a setuid program, which allows local users to overwrite files via a symlink attack...

CVE-2011-1658

ld.so in the GNU C Library aka glibc or libc6 2.13 and earlier expands the $ORIGIN dynamic string token when RPATH is composed entirely of this token, which might allow local users to gain privileges by creating a hard link in an arbitrary directory to a 1 setuid or 2 setgid program with this RPA...

glibc: ld.so insecure handling of privileged programs' RPATHs with $ORIGIN

ld.so in the GNU C Library aka glibc or libc6 2.13 and earlier expands the $ORIGIN dynamic string token when RPATH is composed entirely of this token, which might allow local users to gain privileges by creating a hard link in an arbitrary directory to a 1 setuid or 2 setgid program with this RPA...

Medium severity flaw in QNX Neutrino RTOS

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Nth Dimension Security Advisory NDSA20110310 Date: 10th March 2011 Author: Tim Brown mailto:[email protected] URL: http://www.nth-dimension.org.uk/ / http://www.machine.org.uk/ Product: QNX Neutrino RTOS 6.5.0...

CentOS 5 : glibc (CESA-2010:0793)

Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

glibc: ld.so insecure handling of $ORIGIN in LD_AUDIT for setuid/setgid programs

elf/dl-load.c in ld.so in the GNU C Library aka glibc or libc6 through 2.11.2, and 2.12.x through 2.12.1, does not properly handle a value of $ORIGIN for the LDAUDIT environment variable, which allows local users to gain privileges via a crafted dynamic shared object DSO located in an arbitrary...

glibc: ld.so arbitrary DSO loading via LD_AUDIT in setuid/setgid programs

ld.so in the GNU C Library aka glibc or libc6 before 2.11.3, and 2.12.x before 2.12.2, does not properly restrict use of the LDAUDIT environment variable to reference dynamic shared objects DSOs as audit objects, which allows local users to gain privileges by leveraging an unsafe DSO located in a...

Important: Red Hat Security Advisory: glibc security and bug fix update

Updated glibc packages that fix two security issues and two bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System CVSS base scores, which give detailed severity...

GNU C dynamic linker privilege escalation

Invalid $ORIGIN processing allows to load user library into suid application...

The GNU C library dynamic linker will dlopen arbitrary DSOs during setuid loads.

The GNU C library dynamic linker will dlopen arbitrary DSOs during setuid loads ------------------------------------------------------------------------------- Czesc, This advisory describes CVE-2010-3856, an addendum to CVE-2010-3847. Please see http://seclists.org/fulldisclosure/2010/Oct/257 fo...

GNU C library dynamic linker expands $ORIGIN in setuid library search path

Overview Certain versions of glibc unsafely handle the $ORIGIN ELF substitution sequence which can be exploited to gain local privilege escalation. Description Tavis Ormandy's advisory states:"$ORIGIN is an ELF substitution sequence representing the location of the executable being loaded in the...

The GNU C library dynamic linker expands $ORIGIN in setuid library search path

The GNU C library dynamic linker expands $ORIGIN in setuid library search path ------------------------------------------------------------------------------ Gruezi, This is CVE-2010-3847. The dynamic linker or dynamic loader is responsible for the runtime linking of dynamically linked programs...

RedHat Update for glibc RHSA-2010:0787-01

Check for the Version of glibc OpenVAS Vulnerability Test RedHat Update for glibc RHSA-2010:0787-01 Authors: System Generated Check Copyright: Copyright c 2010 Greenbone Networks GmbH, http://www.greenbone.net This program is free software; you can redistribute it and/or modify it under the terms...

GNU C Library Dynamic Linker Arbitrary DSO dlopen

The GNU C library dynamic linker will dlopen arbitrary DSOs during setuid loads ------------------------------------------------------------------------------- Cześć, This advisory describes CVE-2010-3856, an addendum to CVE-2010-3847. Please see http://seclists.org/fulldisclosure/2010/Oct/257 fo...

GNU C Library 2.x (libc6) - Dynamic Linker LD_AUDIT Arbitrary DSO Load Privilege Escalation

GNU C Library 2.x libc6 - Dynamic Linker LDAUDIT Arbitrary DSO Load Privilege Escalation Source: http://marc.info/?l=full-disclosure&m=128776663124692&w=2 The GNU C library dynamic linker will dlopen arbitrary DSOs during setuid loads...

glibc, nscd security update

CentOS Errata and Security Advisory CESA-2010:0787 Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System CVSS base...