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Operating System: OpenBSD

OpenSSH 8.2p1
Posted Feb 17, 2020
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: SSHFP is now an RFC. Various other bug fixes and updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 3076e6413e8dbe56d33848c1054ac091
OpenSMTPD 6.6.1 Local Privilege Escalation
Posted Feb 11, 2020
Authored by Marco Ivaldi

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell meta-characters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

tags | exploit, remote, arbitrary, shell, root
systems | openbsd
advisories | CVE-2020-7247
MD5 | a5d9222315a88dc369bf246ac8d4d034
OpenBSD OpenSMTPD Privilege Escalation / Code Execution
Posted Jan 29, 2020
Authored by Qualys Security Advisory

Qualys discovered a vulnerability in OpenSMTPD, OpenBSD's mail server. This vulnerability is exploitable since May 2018 (commit a8e222352f, "switch smtpd to new grammar") and allows an attacker to execute arbitrary shell commands, as root.

tags | exploit, arbitrary, shell, root
systems | openbsd
advisories | CVE-2020-7247
MD5 | a167abd4844564a180e18a022a305764
OpenBSD Dynamic Loader chpass Privilege Escalation
Posted Dec 27, 2019
Authored by Brendan Coles, Qualys Security Advisory | Site metasploit.com

This Metasploit module exploits a vulnerability in the OpenBSD ld.so dynamic loader (CVE-2019-19726). The _dl_getenv() function fails to reset the LD_LIBRARY_PATH environment variable when set with approximately ARG_MAX colons. This can be abused to load libutil.so from an untrusted path, using LD_LIBRARY_PATH in combination with the chpass set-uid executable, resulting in privileged code execution. This module has been tested successfully on OpenBSD 6.1 (amd64) and OpenBSD 6.6 (amd64).

tags | exploit, code execution
systems | openbsd
advisories | CVE-2019-19726
MD5 | 0a972f77813616f87fc79b2ebe062ffb
Qualys Security Advisory - OpenBSD Dynamic Loader Privilege Escalation
Posted Dec 12, 2019
Authored by Qualys Security Advisory

Qualys discovered a local privilege escalation in OpenBSD's dynamic loader (ld.so). This vulnerability is exploitable in the default installation (via the set-user-ID executable chpass or passwd) and yields full root privileges. They developed a simple proof of concept and successfully tested it against OpenBSD 6.6 (the current release), 6.5, 6.2, and 6.1, on both amd64 and i386; other releases and architectures are probably also exploitable.

tags | exploit, local, root, proof of concept
systems | openbsd
advisories | CVE-2019-19726
MD5 | 5cd25d74e467c8f83e9ece30c0c6b982
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
Xorg X11 Server Local Privilege Escalation
Posted Nov 12, 2019
Authored by Narendra Shinde | Site metasploit.com

This Metasploit module has been tested with AIX 7.1 and 7.2, and should also work with 6.1. Due to permission restrictions of the crontab in AIX, this module does not use cron, and instead overwrites /etc/passwd in order to create a new user with root privileges. All currently logged in users need to be included when /etc/passwd is overwritten, else AIX will throw 'Cannot get "LOGNAME" variable' when attempting to change user. The Xorg '-fp' parameter used in the OpenBSD exploit does not work on AIX, and is replaced by '-config', in conjuction with ANSI-C quotes to inject newlines when overwriting /etc/passwd.

tags | exploit, root
systems | openbsd, aix
advisories | CVE-2018-14665
MD5 | 441242f216fc75457eaee333db550449
OpenSSH 8.1p1
Posted Oct 9, 2019
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: An exploitable integer overflow bug was found in the private key parsing code for the XMSS key type and addressed. Added protection for private keys at rest in RAM against speculation and memory side-channel attacks like Spectre, Meltdown and Rambleed. Various other bug fixes and updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 513694343631a99841e815306806edf0
OpenSSH 8.0p1
Posted Apr 18, 2019
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Various bug fixes and updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | bf050f002fe510e1daecd39044e1122d
Xorg X11 Server SUID Privilege Escalation
Posted Nov 25, 2018
Authored by Narendra Shinde, Raptor, Aaron Ringo | Site metasploit.com

This Metasploit module attempts to gain root privileges with SUID Xorg X11 server versions 1.19.0 up to 1.20.3. A permission check flaw exists for -modulepath and -logfile options when starting Xorg. This allows unprivileged users that can start the server the ability to elevate privileges and run arbitrary code under root privileges. This Metasploit module has been tested with OpenBSD 6.3, 6.4, and CentOS 7 (1708). CentOS default install will require console auth for the users session. Cron launches the payload so if Selinux is enforcing exploitation may still be possible, but the module will bail. Xorg must have SUID permissions and may not start if running. On exploitation a crontab.old backup file will be created by Xorg. This Metasploit module will remove the .old file and restore crontab after successful exploitation. Failed exploitation may result in a corrupted crontab. On successful exploitation artifacts will be created consistent with starting Xorg and running a cron.

tags | exploit, arbitrary, root
systems | linux, openbsd, centos
advisories | CVE-2018-14665
MD5 | 3bc1656931b4d8bbac2d3b28656c2582
OpenSSH 7.9p1
Posted Oct 19, 2018
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Now requires OpenSSL 1.1.x series 1.1.0g or greater. Various other updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | c6af50b7a474d04726a5aa747a5dce8f
OpenSSH 7.8p1
Posted Aug 24, 2018
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | ce1d090fa6239fd38eb989d5e983b074
rldns 1.2
Posted May 11, 2018
Authored by Ringlayer | Site ringlayer.net

rldns is an open source lightweight DNS server for linux, netbsd, freebsd, and openbsd. Runs on x86 and x86_64 architectures.

Changes: Various updates.
tags | tool, x86
systems | linux, netbsd, unix, freebsd, bsd, openbsd
MD5 | 5b3cb3b9e8efbdc698d6294abcbf309d
OpenSSH 7.7p1
Posted Apr 2, 2018
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 68ba883aff6958297432e5877e9a0fe2
OpenSSH 7.6p1
Posted Oct 4, 2017
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 06a88699018e5fef13d4655abfed1f63
OpenBSD at Stack Clash Privilege Escalation
Posted Jun 30, 2017
Site qualys.com

OpenBSD 'at' local stack clash privilege escalation exploit.

tags | exploit, local
systems | openbsd
advisories | CVE-2017-1000373
MD5 | acb82c1ba12f5809cb4718f34c7c4f71
rldns 1.1
Posted Mar 23, 2017
Authored by Ringlayer | Site ringlayer.net

rldns is an open source lightweight DNS server for linux, netbsd, freebsd, and openbsd. Runs on x86 and x86_64 architectures.

Changes: Various updates.
tags | tool, x86
systems | linux, netbsd, unix, freebsd, bsd, openbsd
MD5 | fa1b4c747d0ea7b13c02993fbb0336e7
OpenSSH 7.5p1
Posted Mar 20, 2017
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 652fdc7d8392f112bef11cacf7e69e23
rldns 1.0
Posted Mar 13, 2017
Authored by Ringlayer | Site ringlayer.net

rldns is an open source lightweight DNS server for linux, netbsd, freebsd, and openbsd. Runs on x86 and x86_64 architectures.

tags | tool, x86
systems | linux, netbsd, unix, freebsd, bsd, openbsd
MD5 | 0ff54b024b64c4bf409da6fc84703fec
OpenBSD HTTP Server 6.0 Denial Of Service
Posted Feb 6, 2017
Authored by Pierre Kim

OpenBSD HTTP server versions up to 6.0 suffer from a denial of service vulnerability.

tags | exploit, web, denial of service
systems | openbsd
advisories | CVE-2017-5850
MD5 | a57c0e5bc7595c3696deb558b8b3eb1f
OpenSSH 7.4p1
Posted Dec 19, 2016
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates.
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | b2db2a83caf66a208bb78d6d287cdaa3
OpenSSH 7.3p1
Posted Aug 2, 2016
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Multiple updates including a security fix.
tags | tool, encryption
systems | linux, unix, openbsd
advisories | CVE-2016-6210
MD5 | 4d88194aa227646df970e71a08943de5
Red Hat Security Advisory 2016-0466-01
Posted Mar 22, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0466-01 - OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions. It was discovered that the OpenSSH sshd daemon did not check the list of keyboard-interactive authentication methods for duplicates. A remote attacker could use this flaw to bypass the MaxAuthTries limit, making it easier to perform password guessing attacks.

tags | advisory, remote, protocol
systems | linux, redhat, openbsd
advisories | CVE-2015-5600, CVE-2016-3115
MD5 | e44b5828174b738b958cd4b364fac26f
Red Hat Security Advisory 2016-0465-01
Posted Mar 22, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0465-01 - OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. It was discovered that the OpenSSH server did not sanitize data received in requests to enable X11 forwarding. An authenticated client with restricted SSH access could possibly use this flaw to bypass intended restrictions. An access flaw was discovered in OpenSSH; the OpenSSH client did not correctly handle failures to generate authentication cookies for untrusted X11 forwarding. A malicious or compromised remote X application could possibly use this flaw to establish a trusted connection to the local X server, even if only untrusted X11 forwarding was requested.

tags | advisory, remote, local, protocol
systems | linux, redhat, openbsd
advisories | CVE-2016-1908, CVE-2016-3115
MD5 | 758ad6357c15b1959d34616f06b740c8
OpenSSH 7.2p2
Posted Mar 12, 2016
Authored by Damien Miller | Site openssh.com

This is a Linux/portable port of OpenBSD's excellent OpenSSH. OpenSSH is based on the last free version of Tatu Ylonen's SSH with all patent-encumbered algorithms removed, all known security bugs fixed, new features reintroduced, and many other clean-ups.

Changes: Added sanitization for characters destined for xauth(1).
tags | tool, encryption
systems | linux, unix, openbsd
MD5 | 13009a9156510d8f27e752659075cced
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