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Qualys Security Advisory - Qmail Remote Code Execution
Posted May 21, 2020
Authored by Alexander Peslyak, Qualys Security Advisory, Stephane Bellenger, Jean-Paul Michel, Julien Barthelemy, Andrew Richards

In 2005, three vulnerabilities were discovered in qmail but were never fixed because they were believed to be unexploitable in a default installation. Qualys recently re-discovered these vulnerabilities and were able to exploit one of them remotely in a default installation.

tags | exploit, vulnerability
advisories | CVE-2005-1513, CVE-2005-1514, CVE-2005-1515, CVE-2020-3811, CVE-2020-3812
MD5 | f669ab533f30c6f109eb83ceceabfd6c

Related Files

OpenSMTPD Out-Of-Bounds Read
Posted Feb 25, 2020
Authored by Qualys Security Advisory

Qualys discovered a vulnerability in OpenSMTPD, OpenBSD's mail server. This vulnerability, an out-of-bounds read introduced in December 2015, is exploitable remotely and leads to the execution of arbitrary shell commands.

tags | exploit, arbitrary, shell
systems | openbsd
advisories | CVE-2020-8794
MD5 | a2c12d92302d9d428325ff4fc6f243ba
OpenSMTPD Local Information Disclosure
Posted Feb 25, 2020
Authored by Qualys Security Advisory

Qualys discovered a minor vulnerability in OpenSMTPD, OpenBSD's mail server. An unprivileged local attacker can read the first line of an arbitrary file (for example, root's password hash in /etc/master.passwd) or the entire contents of another user's file (if this file and /var/spool/smtpd/ are on the same filesystem). A proof of concept exploit is included in this archive.

tags | exploit, arbitrary, local, root, proof of concept
systems | openbsd
advisories | CVE-2020-8793
MD5 | 56573da09e74bf6cccffa5506e80c6d3
Qualys Security Advisory - OpenBSD Authentication Bypass / Privilege Escalation
Posted Dec 5, 2019
Site qualys.com

Qualys has discovered that OpenBSD suffers from multiple authentication bypass and local privilege escalation vulnerabilities.

tags | exploit, local, vulnerability
systems | openbsd
advisories | CVE-2019-19519, CVE-2019-19520, CVE-2019-19521, CVE-2019-19522
MD5 | d6969e8f9fe831e7159e05c1c9e6aa26
Exim 4.9.1 Remote Command Execution
Posted Jun 6, 2019
Authored by Qualys Security Advisory

Qualys discovered a remote command execution vulnerability in Exim versions 4.87 to 4.91.

tags | advisory, remote
advisories | CVE-2019-10149
MD5 | bad52ccc6a1c8c1cead9b91ad808d490
Linux create_elf_tables() Integer Overflow
Posted Sep 26, 2018
Authored by Qualys Security Advisory

Linux suffers from an integer overflow vulnerability in create_elf_tables(). Multiple exploits provided.

tags | exploit, overflow
systems | linux
advisories | CVE-2018-14634
MD5 | 5ec6314ab72881f0d67179acf1811540
Qualys Security Advisory - GNU C Library Memory Leak / Buffer Overflow
Posted Dec 13, 2017
Authored by Qualys Security Advisory

Qualys has discovered a memory leak and a buffer overflow in the dynamic loader (ld.so) of the GNU C Library (glibc).

tags | exploit, overflow, memory leak
advisories | CVE-2017-1000408, CVE-2017-1000409
MD5 | 627d9c13d012677a6feb6b4514cbb8e3
Linux Local Privilege Escalation
Posted Sep 28, 2017
Authored by Qualys Security Advisory

A Linux PIE/stack corruption vulnerability exists. Most notably, all versions of CentOS 7 before 1708 (released on September 13, 2017), all versions of Red Hat Enterprise Linux 7 before 7.4 (released on August 1, 2017), and all versions of CentOS 6 and Red Hat Enterprise Linux 6 are exploitable.

tags | advisory
systems | linux, redhat, centos
advisories | CVE-2017-1000253
MD5 | b53db8644bb756103fde5373b019b1c1
Sudo get_process_ttyname() Race Condition
Posted Jun 2, 2017
Site qualys.com

Sudo's get_process_ttyname() on Linux suffers from a race condition that allows for root privilege escalation.

tags | exploit, root
systems | linux
advisories | CVE-2017-1000367
MD5 | 5eda82fe13ce7a497c72ac993b7334e1
Qualys Security Advisory - OpenSSH Overflow / Leak
Posted Jan 15, 2016
Authored by Qualys Security Advisory

Since version 5.4 (released on March 8, 2010), the OpenSSH client supports an undocumented feature called roaming: if the connection to an SSH server breaks unexpectedly, and if the server supports roaming as well, the client is able to reconnect to the server and resume the suspended SSH session. Although roaming is not supported by the OpenSSH server, it is enabled by default in the OpenSSH client, and contains two vulnerabilities that can be exploited by a malicious SSH server (or a trusted but compromised server): an information leak (memory disclosure), and a buffer overflow (heap-based).

tags | advisory, overflow, vulnerability
advisories | CVE-2016-0777, CVE-2016-0778
MD5 | 2360520b5690a162d17aeb52bbfce9f6
Qualys Security Advisory - LibreSSL Leak / Overflow
Posted Oct 18, 2015
Authored by Qualys Security Advisory

Qualys discovered various vulnerabilities in LibreSSL. These include a memory leak and a buffer overflow.

tags | advisory, overflow, vulnerability, memory leak
advisories | CVE-2015-5333, CVE-2015-5334
MD5 | a09c98183d166108c5dbf9105951954a
Qualys Security Advisory - OpenSMTPD Audit Report
Posted Oct 4, 2015
Authored by Qualys Security Advisory

Qualys discovered various vulnerabilities in OpenSMTPD. These include, but are not limited to, denial of service, buffer overflow, hardlink attack and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability
MD5 | 20c4ffd499c1a6466cfce72f6b1c0a80
Qualys Security Advisory - userhelper / libuser
Posted Jul 23, 2015
Authored by Qualys Security Advisory

The libuser library implements a standardized interface for manipulating and administering user and group accounts, and is installed by default on Linux distributions derived from Red Hat's codebase. During an internal code audit at Qualys, they discovered multiple libuser-related vulnerabilities that allow local users to perform denial-of-service and privilege-escalation attacks. As a proof of concept, they developed an unusual local root exploit against one of libuser's applications. Both the advisory and exploit are included in this post.

tags | exploit, local, root, vulnerability, proof of concept
systems | linux, redhat
advisories | CVE-2015-3245, CVE-2015-3246
MD5 | d10eb7969178d2c38456f40ec558206a
apachedos.pl
Posted Dec 6, 2002
Authored by deadbeat

Apache 1.3.xx / Tomcat server with mod_jk remote denial of service exploit which uses chunked encoding requests, as described in Qualys Security Advisory QSA-2002-12-04.

tags | remote, denial of service
MD5 | c7f85ed6f302d629522b05fc9cf22ba4
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