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Operating System: OpenBSD

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
SHA-256 | f17dd04f6e2715e22520176b0b9b59af9523bd1f17067f5a5814eb8675c0497d
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
SHA-256 | cdb60dbe662ae825c2e68b4e3467951ff4065037e1a4c7ab93afe4fd720eaf44
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
SHA-256 | 02f5dbef3835d0753556f973cd57b4c19b6b1f6cd24c03445e23ac77ca1b93ff
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
SHA-256 | bd943879e69498e8031eb6b7f44d08cdc37d59a7ab689aa0b437320c3481fd68
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
SHA-256 | 720e628b35284931ff0424715e648634cd3ec31db1a89c8b1fff88eddfb6f4ab
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
SHA-256 | 6b4b3ba2253d84ed3771c8050728d597c91cfce898713beb7b64a305b6f11aad
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
SHA-256 | 1a484bb15152c183bb2514e112aa30dd34138c3cfb032eee5490a66c507144ca
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
SHA-256 | 3ef0107cfa51f2818c05a51cce9b22d87404ba178c87f4441cf3b73f5957e175
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
SHA-256 | d73be7e684e99efcd024be15a30bffcbe41b012b2f7b3c9084aed621775e6b8f
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
SHA-256 | a323caeeddfe145baaa0db16e98d784b1fbc7dd436a6bf1f479dfd5cd1d21723
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
SHA-256 | a80fd36081b8074669422ec386b383f6b02e6147e8b26cd6b180b8bcfaa859d2
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
SHA-256 | fa02006cf534737a5fc492d24fc79aa7e37c09d5a4c386dd069f865cfe8b126a
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
SHA-256 | 9846e3c5fab9f0547400b4d2c017992f914222b3fd1f8eee6c7dc6bc5e59f9f0
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
SHA-256 | c71120177f5b183bcef952217dff5bd599a68f725f3425068bd2537d987c5c04
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
SHA-256 | 8cb179fc0c44b36068a2fb1ea7d4c3cb44fce813eaf3de73953f10a2bfceac82
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
SHA-256 | 1b1fc4a14e2024293181924ed24872e6f2e06293f3e8926a376b8aec481f19d1
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
SHA-256 | efc912a2ef7e938fa36df6787cd9d21b45463cd4f9d70764e9e61a961786691b
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
SHA-256 | 93381a3609cbd40ea19fd90f3d6532393c3c33d49bf30bab516193963789fd55
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
SHA-256 | ec747fbcdba74a44a4ea458f9664256110da65f71f30774569e157e19509d8de
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
SHA-256 | a72781d1a043876a224ff1b0032daa4094d87565a68528759c1c2cab5482548c
OpenSSH 7.2p1
Posted Feb 29, 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: Skip PrintLastLog in config dump mode. Added a note about using xlc on AIX. Various other bug fixes.
tags | tool, encryption
systems | linux, openbsd
SHA-256 | 973cc37b2f3597e4cf599b09e604e79c0fe5d9b6f595a24e91ed0662860b4ac3
OpenSSH 7.1p2
Posted Jan 15, 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: Forcibly disables roaming support in the client. Various other bug fixes.
tags | tool, encryption
systems | linux, unix, openbsd
SHA-256 | dd75f024dcf21e06a0d6421d582690bf987a1f6323e32ad6619392f3bfde6bbd
Red Hat Security Advisory 2016-0043-01
Posted Jan 15, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0043-01 - OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. An information leak flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to leak portions of memory of a successfully authenticated OpenSSH client. A buffer overflow flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to execute arbitrary code on a successfully authenticated OpenSSH client if that client used certain non-default configuration options.

tags | advisory, overflow, arbitrary, protocol
systems | linux, redhat, openbsd
advisories | CVE-2016-0777, CVE-2016-0778
SHA-256 | 3ce7d8e13f6ac4af2d35ebb62eb062b0e3db89ea4ad51c709407b958ae9fd6c9
Red Hat Security Advisory 2015-2088-06
Posted Nov 20, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2088-06 - OpenSSH is OpenBSD's SSH protocol implementation. These packages include the core files necessary for both the OpenSSH client and server. A flaw was found in the way OpenSSH handled PAM authentication when using privilege separation. An attacker with valid credentials on the system and able to fully compromise a non-privileged pre-authentication process using a different flaw could use this flaw to authenticate as other users. A use-after-free flaw was found in OpenSSH. An attacker able to fully compromise a non-privileged pre-authentication process using a different flaw could possibly cause sshd to crash or execute arbitrary code with root privileges.

tags | advisory, arbitrary, root, protocol
systems | linux, redhat, openbsd
advisories | CVE-2015-5600, CVE-2015-6563, CVE-2015-6564
SHA-256 | 969133ceccf94cfbbd19259f9b16682286538b1be6ef824cd26361a6825383a7
OpenBSD net-snmp Information Disclosure
Posted Nov 13, 2015
Authored by Pierre Kim

OpenBSD net-snmp suffers from a credential and information disclosure vulnerability.

tags | exploit, info disclosure
systems | openbsd
advisories | CVE-2015-8100
SHA-256 | a80d494deb52dc8a57e8c8f3a438e4dc2e1095c1a787fbcd33b9d4404d060cac
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