hmarco.org

Hector Marco Gisbert - Lecturer and Cyber Security Researcher

Hector Marco, PhD. Lecturer and Cyber Security researcher. Lecturer and Cyber Security researcher at UWS. Security, virtualization, Kernel Programming, Assembler, ARM, i386, x86 64, sparcv8, MIPS. I revisited mature and well known techniques, as SSP (Stack Smashing Protection) and ASLR (Address Space Layout Randomization), and I was able to make substantial contributions like RenewSSP and ASLR-NG. Back to 28: Grub 0-Day. PhD in Computer Science, Cyber Security. Bachelor of Science in Computer Science.

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Hector Marco Gisbert - Lecturer and Cyber Security Researcher | hmarco.org Reviews

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Hector Marco, PhD. Lecturer and Cyber Security researcher. Lecturer and Cyber Security researcher at UWS. Security, virtualization, Kernel Programming, Assembler, ARM, i386, x86 64, sparcv8, MIPS. I revisited mature and well known techniques, as SSP (Stack Smashing Protection) and ASLR (Address Space Layout Randomization), and I was able to make substantial contributions like RenewSSP and ASLR-NG. Back to 28: Grub 0-Day. PhD in Computer Science, Cyber Security. Bachelor of Science in Computer Science.

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2 hector marco cv

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4 hmarco hmarco

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6 keywords

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8 aslr ng

9 renew ssp

10 amd aslr weakness

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Hector Marco Gisbert - Lecturer and Cyber Security Researcher | hmarco.org Reviews

https://hmarco.org

Hector Marco, PhD. Lecturer and Cyber Security researcher. Lecturer and Cyber Security researcher at UWS. Security, virtualization, Kernel Programming, Assembler, ARM, i386, x86 64, sparcv8, MIPS. I revisited mature and well known techniques, as SSP (Stack Smashing Protection) and ASLR (Address Space Layout Randomization), and I was able to make substantial contributions like RenewSSP and ASLR-NG. Back to 28: Grub 0-Day. PhD in Computer Science, Cyber Security. Bachelor of Science in Computer Science.

INTERNAL PAGES

hmarco.org

1

CVE-2013-6876 - s3dvt-0.2.2 - root shell

http://hmarco.org/bugs/s3dvt_0.2.2-root-shell.html

CVE-2013-6876 - s3dvt root shell. Lack of checking setuid() return code. 10 December 2013 - Discovered the bug. 25 March 2014 - Public disclosure. A bug in s3dvt. For versions prior to 0.2.2 has been found. The bug is caused by not checking the return values of. Calls The process must not continue its normal execution when any of these calls fail (return an error) to drop privileges. The drop privileges in s3dvt. Because the bash setuid() bug. The bug appears because the return value of the. The strategy...

2

Defensive techniques - Hector Marco

http://hmarco.org/cyber-security/defence/defences.html

The following summarize some defensive techniques which have been developoed by Hector Marco-Gisbert and Ismael Ripoll. Address Space Layout Next Generation. A modification of the Stack Smashing Protector. SSP brute force attacks. Hector Marco - http:/ hmarco.org.

3

Hector Marco homepage [renewSSP]

http://hmarco.org/renewssp/renewssp.html

Renew Stack Smashing Protector (brief). Preventing brute force attacks against stack canary protection on networking servers. A new Stack Smashing Protector design to prevent brute force attacks against the SSP with a negligible cost. Eliminates brute force attacks. Against the canary. Specially the very dangerous SSP byte-for-byte attack is not longer possible. The attacker is not able to attack first the stack canary and later the ASLR. The attack can not be split. Hector Marco - http:/ hmarco.org.

4

CVE-2014-5439 - Root shell on Sniffit

http://hmarco.org/bugs/CVE-2014-5439-sniffit_0.3.7-stack-buffer-overflow.html

CVE-2014-5439 - Root shell on Sniffit. July 2014 - Discovered the vulnerability. Is a packet sniffer and monitoring tool. A bug in sniffit prior to 0.3.7 has been found. The bug is caused by an incorrect implementation of the functions. Which causes a stack buffer overflow when parsing a configuration file with "long" paths (more than 20 characters). The attacker can to create a specially-crafted sniffit configuration file. Which is able to bypass all three protection mechanisms. The bug appears in file.

5

CVE's - Hector Marco

http://hmarco.org/bugs/cves.html

The following summarize most of the vulnerabilities and software exposures found and reported by Hector Marco-Gisbert and Ismael Ripoll. Linux <= 4.5. Grub2 <= 2.02. Glibc <= 2.22.90. Linux ASLR <= 4.0. AMD Linux ASLR weakness. Linux ASLR <= 3.18. Linux ASLR <= 3.19. Google Email 4.2.2. Sniffit <= 0.3.7. DCMTK <= 3.6.1. S3dvt <= 0.2.2. S3dvt <= 0.2.2. Glibc <= 2.17. Hector Marco - http:/ hmarco.org.

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cybersecurity.upv.es

Page site of CYBERSECURITY

http://cybersecurity.upv.es/awards.html

A small security research group with solid background. Research to solve real. Problems with real solutions. Google Patch Reward Program. Google rewarded us for removing the possibility to disable the ASLR. In the Linux kernel for 32-bit apps. Any user, able to run 32-bit applications in a x86 machine, could disable the ASLR by setting the RLIMIT STACK resource to unlimited. Which was a problem when executing privileged application (i.e. setuid/setgid executables). Now, the ASLR can no longer be disabled.

cybersecurity.upv.es

Offset2lib: bypassing full ASLR on 64bit Linux

http://cybersecurity.upv.es/attacks/offset2lib/offset2lib.html

A small security research group with solid background. Research to solve real. Problems with real solutions. Offset2lib: bypassing full ASLR on 64bit Linux. 2014 at DeepSeC in Vienna ( https:/ deepsec.net. Offset2lib is a security weakness on the implementation of the ASLR in GNU/Linux when the executable is PIE compiled. It is specific to GNU/Linux and does not affect Windows or Mac OS. It is not a programming error on the code that implements the ASLR, but a weakness on the design. Fortunately,...The p...

cybersecurity.upv.es

Page site of CYBERSECURITY

http://cybersecurity.upv.es/projects.html

A small security research group with solid background. Research to solve real. Problems with real solutions. Projects with active participation. We have actively participated (coding, designing, leading, advising, etc.) in a large number of projects. There are all "kind" of projects: public and private financed; basic research; product development; prospective research; and national (Spanish) and European projects. Adaptive And Resilient Networked Embedded Systems. Ministerio De Economia Y Competitividad.

cybersecurity.upv.es

ASLR-NG: ASLR Next Generation

http://cybersecurity.upv.es/solutions/aslr-ng/aslr-ng.html

A small security research group with solid background. Research to solve real. Problems with real solutions. White paper [ pdf. Presented at BlackHat Asia 2016. ASLR-NG: ASLR Next Generation. Memory layouts of 100 executions (. Obtained using the ASLRA. We have designed a new ASLR, called ASLR-NG, which provides the maximum entropy without jeopardizing fragmentation. ASLR-NG also addresses several other weaknesses of current designs. ASLR Weaknesses in Linux and PaX. Current ASLRs have been implemented b...

cybersecurity.upv.es

Fixing Offset2lib weakness

http://cybersecurity.upv.es/solutions/aslrv2/aslrv2.html

A small security research group with solid background. Research to solve real. Problems with real solutions. Current ASLR implementation in Linux suffers from the offset2lib. Weakness. Here we present a simple solution (a small patch) to fix it. The current implementation of ASLR in Linux defines three randomly located zones for PIE executables (for most Linux architectures): a zone to allocate the stack, another for the heap and another zone to locate the shared objects (referred as. The Pax patch imple...

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hmarco.org

Hector Marco Gisbert - Lecturer and Cyber Security Researcher

Hector Marco, PhD. Lecturer and Cyber Security researcher. Lecturer and Cyber Security researcher at UWS. Security, virtualization, Kernel Programming, Assembler, ARM, i386, x86 64, sparcv8, MIPS. I revisited mature and well known techniques, as SSP (Stack Smashing Protection) and ASLR (Address Space Layout Randomization), and I was able to make substantial contributions like RenewSSP and ASLR-NG. Back to 28: Grub 0-Day. PhD in Computer Science, Cyber Security. Bachelor of Science in Computer Science.

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