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Files from Sebastian Krahmer

Email addresskrahmer at suse.de
First Active2000-08-09
Last Active2019-02-07
Evince CBT File Command Injection
Posted Feb 7, 2019
Authored by Sebastian Krahmer, Brendan Coles, Matlink, Felix Wilhelm | Site metasploit.com

This Metasploit module exploits a command injection vulnerability in Evince before version 3.24.1 when opening comic book `.cbt` files. Some file manager software, such as Nautilus and Atril, may allow automatic exploitation without user interaction due to thumbnailer preview functionality. Note that limited space is available for the payload.

tags | exploit
advisories | CVE-2017-1000083
SHA-256 | be7441cb5d0ca4f4495067990292385a52fbdd586a1d34cad46036dcc7576c4c
Systemd 228 Privilege Escalation
Posted Jan 27, 2017
Authored by Sebastian Krahmer

Systemd 228 privilege escalation proof of concept exploit.

tags | exploit, proof of concept
advisories | CVE-2016-10156
SHA-256 | 6b14fcec71f39cc0a4236c05609dc098d814a5a7ed06a586203099ee60d54d5e
Fedora 12 setroubleshootd Local Root Proof Of Concept
Posted Mar 30, 2015
Authored by Sebastian Krahmer

Fedora 21 setroubleshootd local root proof of concept exploit.

tags | exploit, local, root, proof of concept
systems | linux, fedora
SHA-256 | 11547b584c917b7adec234f03ba707e23f8dbd3a90635d158af5ff31b4a7e6b8
Docket 0.11 VMM-Container Breakout
Posted Jun 18, 2014
Authored by Sebastian Krahmer

This code demonstrates that any given docker image someone is asking you to run in your docker setup can access ANY file on your host, e.g. dumping hosts /etc/shadow or other sensitive info, compromising security of the host and any other docker VM's on it.

tags | exploit
SHA-256 | 79a596f0ad35ccd46be65186db4b3f63701dd6939dde09f6ffd6c4df24a5afbe
Darklena fprintd/pam_fprintd Local Root
Posted May 30, 2014
Authored by Sebastian Krahmer

pam_fprintd local root proof of concept exploit that spawns a shell. pam_fprintd uses net.reactivated.Fprint service to trigger finger swiping and registers DBUS signal inside the PAM authentication function. Then, when the DBUS signal arrives, the signal argument is basically just checked to be the "verify-match" string; which however is expected to come from the legit net.reactivated.Fprint service. Since there is no message filter registered in either pam_fprintd, nor inside dbus-glib which it is using, such signals can be spoofed by anyone.

tags | exploit, shell, local, root, spoof, proof of concept
advisories | CVE-2013-0292
SHA-256 | d7d878eac758bfcc9a041d7672f578aa68bacf6ae2cbd54d692e6da69a937360
dhclient 4.2.x Remote Code Execution
Posted Apr 7, 2011
Authored by Sebastian Krahmer, Marius Tomaschewski | Site isc.org

ISC dhclient does not strip or escape certain shell meta-characters in dhcpd responses, allowing a rogue server or party with with escalated privileges on the server to cause remote code execution on the client. Versions 3.0.x through 4.2.x are affected.

tags | advisory, remote, shell, code execution
advisories | CVE-2011-0997
SHA-256 | 74c7470b833e5a628636a879d280edb69870985e9edf88bd5ec22165c18462fa
bbpaint.pdf
Posted Jun 27, 2006
Authored by Sebastian Krahmer

Whitepaper describing how ptrace() might be used to build a Control Flow Integrity system.

tags | paper
SHA-256 | c116bf363fbe80ec31ebfc362d155528cd6c82b900bf111d6312056eee6b8fa1
instrumental.pdf
Posted Jun 27, 2006
Authored by Sebastian Krahmer

Whitepaper discussing how to generate runtime call graphs using certain GCC features.

tags | paper
SHA-256 | 4d10085768771f85a4a59ba1019a21073548bb46219ab3fc29520dcb7a124397
no-nx.pdf
Posted Oct 6, 2005
Authored by Sebastian Krahmer

x86-64 buffer overflow exploits and the borrowed code chunk exploitation technique. Whitepaper describing NX technology and its limitations. It contains in depth discussion and sample code for the Hammer/Linux platform, analyzes the weaknesses and discusses countermeasures.

tags | paper, overflow, x86
systems | linux
SHA-256 | b0c251d6ab0e7d35b001203d842192143611eb73e2e95273a80273ed88afccba
SUSE Security Announcement 2004.25
Posted Aug 13, 2004
Authored by Sebastian Krahmer, Novell | Site suse.com

SUSE Security Announcement - The SuSE Security Team has discovered various remotely exploitable buffer overflows in the MSN-protocol parsing functions during a code review of the MSN protocol handling code of gaim. Remote attackers can execute arbitrary code as the user running the gaim client.

tags | advisory, remote, overflow, arbitrary, protocol
systems | linux, suse
advisories | CVE-2004-0500
SHA-256 | da2f9073a7f83965ed45ec7bb72412cb359a6d649f321acf0c0507490a7f2cc6
SuSE-SA:2004:008.txt
Posted Apr 15, 2004
Authored by Sebastian Krahmer | Site suse.com

SuSE Security Advisory SuSE-SA:2004:008 - Two vulnerabilities have been discovered in CVS that can be exploited by malicious servers to compromise clients and by malicious users to retrieve arbitrary files from servers. Versions below 1.11.15 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, suse
SHA-256 | 634465bf9d0bf7d62e31bf17a6f6268ae520d0e80fc702c299ae1cadf2f0691f
loaded-0.21.tgz
Posted May 28, 2003
Authored by teso, Sebastian Krahmer | Site team-teso.net

loaded version 0.21 is an IPv4 load balancer for Linux. It requires netfilter and the QUEUE target enabled in the kernel.

tags | kernel
systems | linux
SHA-256 | 289bf4facdf46653729a2bdb276ddbe1c97e51adb9d403a39f2cd8e30e4643c6
guess-who-0.44.tgz
Posted May 28, 2003
Authored by teso, Sebastian Krahmer | Site team-teso.net

guess-who version 0.44 is a password brute force utility for SSH2.

SHA-256 | 214fd24fdc31ce0ae27321085714876bb3c2d68ef8c3cd97400ae0dbb86f3d8a
samba-2.2.8.txt
Posted Mar 17, 2003
Authored by Sebastian Krahmer | Site samba.org

A flaw has been detected in the Samba main smbd code which could allow an external attacker to remotely and anonymously gain Super User privileges on a server running a Samba server. This flaw exists in previous versions of Samba from 2.0.x to 2.2.7a inclusive.

tags | advisory
SHA-256 | d9d18486c65a3043320836414cd4f678d6cbe01114532b8b8586392702e4e88b
epta.tgz
Posted Dec 3, 2002
Authored by teso, Sebastian Krahmer | Site team-teso.net

Execution Path Timing Analysis of Unix Daemons - White paper on how to determine if a username is valid remotely by timing remote responses of login programs. OpenSSH diff against v2.99p2 which determines if a username exists even on the newest versions of OpenSSH included.

tags | remote
systems | unix
SHA-256 | d10799a160420e1d98d3d1d82b71b468d6f8cbe44e6d70f262dddffda7cb071c
hack.pl
Posted Nov 30, 2002
Authored by teso, Sebastian Krahmer | Site team-teso.net

Suidperl v5.00503 and others tmp race local root exploit.

tags | local, root
SHA-256 | 0cbc7a3b56529f76acc7c8ceebd4879b13b5f1e22f44319f11c7a07fcafd8c9d
rootprobe.sh
Posted Nov 30, 2002
Authored by Sebastian Krahmer | Site team-teso.net

Modprobe shell metacharacter expansion local root exploit for Red Hat 7.x and SuSE 7.x.

tags | exploit, shell, local, root
systems | linux, redhat, suse
SHA-256 | 7fbdc5e8a76bd2dfcc6ee414e1ca54dbf13a22c9c260b4f09dc6008c2feaf6c9
scalpel.c
Posted Nov 30, 2002
Authored by Sebastian Krahmer | Site team-teso.net

Local apache/PHP root exploit via libmm (apache-user -> root) temp race exploit. Spawns a root shell from the apache user.

tags | exploit, shell, local, root, php
SHA-256 | 1d5db464c8ba2e2fbf07162312ad2209781d2a9e0aa4407600ee8c2e6029a683
chap.pdf
Posted Feb 26, 2002
Authored by teso, Sebastian Krahmer | Site team-teso.net

Weaknesses in the CHAP protocol as used within PPP and PPTP. Allows authentication in PPTP networks without knowing valid login/password combinations. This authentication scheme is widely used at universities (WLAN networks). A link to a special pppd which is able to authenticate without valid /etc/ppp/chap-secrets is included.

tags | protocol
SHA-256 | a57abb2faae0727b81e1510955840c818aed9a508d24a18b84c7c47e18cd0da4
openssh.reverse.tgz
Posted Oct 3, 2000
Authored by teso, Sebastian Krahmer | Site team-teso.net

Openssh-Reverse is a patched OpenSSH which goes in reverse, allowing outside users to connect to machines behind NAT firewalls. In reverse mode, sshd acts as a client and brings the connection to a modified ssh server.

SHA-256 | c83bf07ed61053f6c369bd3bd2c8252548532e232e27ee4365928a0691d9ff64
suidperlhack.pl
Posted Aug 9, 2000
Authored by Sebastian Krahmer | Site cs.uni-potsdam.de

suidperlhack.pl is a Suidperl v5.00503 and below local root exploit which hsa been ported to perl to increase portability. Tested against BSD.

tags | exploit, local, root, perl
systems | bsd
SHA-256 | e05392bbc9c59fbd159d56c51c1520fd954fc0cc8df635afbc6e183a39b0fe92
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