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Operating System: FreeBSD

FreeBSD Security Advisory - FreeBSD-SA-16:03.linux
Posted Jan 15, 2016
Authored by Mateusz Guzik

FreeBSD Security Advisory - A programming error in the handling of Linux futex robust lists may result in incorrect memory locations being accessed. It is possible for a local attacker to read portions of kernel memory, which may result in a privilege escalation.

tags | advisory, kernel, local
systems | linux, freebsd
advisories | CVE-2016-1880
MD5 | 19a4fbae13440bc000d627d27942b0ed
FreeBSD Security Advisory - FreeBSD-SA-16:04.linux
Posted Jan 15, 2016
Authored by Dmitry Chagin

FreeBSD Security Advisory - A programming error in the Linux compatibility layer setgroups(2) system call can lead to an unexpected results, such as overwriting random kernel memory contents. It is possible for a local attacker to overwrite portions of kernel memory, which may result in a privilege escalation or cause a system panic.

tags | advisory, kernel, local
systems | linux, freebsd
advisories | CVE-2016-1881
MD5 | 9ab82b9be2871f73b833b0650d17e096
FreeBSD Security Advisory - BIND Denial Of Service
Posted Dec 16, 2015
Site security.freebsd.org

FreeBSD Security Advisory - An error in the parsing of incoming responses allows some records with an incorrect class to be be accepted by BIND instead of being rejected as malformed. This can trigger a REQUIRE assertion failure when those records are subsequently cached. An attacker who can cause a server to request a record with a malformed class attribute can use this bug to trigger a REQUIRE assertion in db.c, causing named to exit and denying service to clients. The risk to recursive servers is high. Authoritative servers are at limited risk if they perform authentication when making recursive queries to resolve addresses for servers listed in NS RRSETs.

tags | advisory
systems | freebsd
advisories | CVE-2015-8000
MD5 | 06a85ebaa8919f1b808bbd7331ec41b8
FreeBSD Security Advisory - OpenSSL Issues
Posted Dec 6, 2015
Site security.freebsd.org

FreeBSD Security Advisory - OpenSSL has had multiple vulnerabilities addressed. The signature verification routines will crash with a NULL pointer dereference if presented with an ASN.1 signature using the RSA PSS algorithm and absent mask generation function parameter. When presented with a malformed X509_ATTRIBUTE structure, OpenSSL will leak memory. If PSK identity hints are received by a multi-threaded client then the values are incorrectly updated in the parent SSL_CTX structure.

tags | advisory
systems | freebsd
advisories | CVE-2015-3194, CVE-2015-3195, CVE-2015-3196
MD5 | 0ced99acb2a23bfd013e2e6894d43ce7
FreeBSD Security Advisory - ntp Authentication Bypass
Posted Oct 26, 2015
Site security.freebsd.org

FreeBSD Security Advisory - Crypto-NAK packets can be used to cause ntpd(8) to accept time from an unauthenticated ephemeral symmetric peer by bypassing the authentication required to mobilize peer associations. FreeBSD 9.3 and 10.1 are not affected. Various other issues have also been addressed.

tags | advisory, crypto
systems | freebsd
advisories | CVE-2015-7701, CVE-2015-7702, CVE-2015-7703, CVE-2015-7704, CVE-2015-7848, CVE-2015-7849, CVE-2015-7850, CVE-2015-7851, CVE-2015-7852, CVE-2015-7853, CVE-2015-7854, CVE-2015-7855, CVE-2015-7871
MD5 | ad57d8b6fd48b773d3e8e84c18d972e4
FreeBSD Security Advisory - rpcbind(8) Denial Of Service
Posted Sep 30, 2015
Site security.freebsd.org

FreeBSD Security Advisory - In rpcbind(8), netbuf structures are copied directly, which would result in two netbuf structures that reference to one shared address buffer. When one of the two netbuf structures is freed, access to the other netbuf structure would result in an undefined result that may crash the rpcbind(8) daemon. A remote attacker who can send specifically crafted packets to the rpcbind(8) daemon can cause it to crash, resulting in a denial of service condition.

tags | advisory, remote, denial of service
systems | freebsd
advisories | CVE-2015-7236
MD5 | 85136eada6303b10454b9288940958f4
FreeBSD Security Advisory - BIND Denial Of Service
Posted Sep 2, 2015
Site security.freebsd.org

FreeBSD Security Advisory - Parsing a malformed DNSSEC key can cause a validating resolver to exit due to a failed assertion in buffer.c. A remote attacker can deliberately trigger the failed assertion which will cause an affected server to terminate, by using a query that requires a response from a zone containing a malformed key, resulting in a denial of service condition. Recursive servers are at greatest risk, however, an authoritative server could also be affected, if an attacker controls a zone that the server must query against to perform its zone service.

tags | advisory, remote, denial of service
systems | freebsd
advisories | CVE-2015-5722
MD5 | 2223cf4358d2bd313c49a41886d70f86
FreeBSD Security Advisory - IRET Handler Privilege Escalation
Posted Aug 26, 2015
Site security.freebsd.org

FreeBSD Security Advisory - If the kernel-mode IRET instruction generates an #SS or #NP exception, but the exception handler does not properly ensure that the right GS register base for kernel is reloaded, the userland GS segment may be used in the context of the kernel exception handler. By causing an IRET with #SS or #NP exceptions, a local attacker can cause the kernel to use an arbitrary GS base, which may allow escalated privileges or panic the system.

tags | advisory, arbitrary, kernel, local
systems | freebsd
advisories | CVE-2015-5675
MD5 | d5d0c2195194e85821432831db9e3e56
FreeBSD Security Advisory - OpenSSH Issues
Posted Aug 26, 2015
Site security.freebsd.org

FreeBSD Security Advisory - A programming error in the privileged monitor process of the sshd(8) service may allow the username of an already-authenticated user to be overwritten by the unprivileged child process. A use-after-free error in the privileged monitor process of he sshd(8) service may be deterministically triggered by the actions of a compromised unprivileged child process. A use-after-free error in the session multiplexing code in the sshd(8) service may result in unintended termination of the connection.

tags | advisory
systems | freebsd
MD5 | 560af56953e2f87247cba46c3c23c38c
HP Security Bulletin HPSBGN03395 1
Posted Aug 24, 2015
Authored by HP | Site hp.com

HP Security Bulletin HPSBGN03395 1 - A potential security vulnerability has been identified with HP KeyView running on HP-UX, Linux, Solaris, Windows, FreeBSD, and AIX. The vulnerability could be exploited remotely to allow execution of code. Revision 1 of this advisory.

tags | advisory
systems | linux, windows, solaris, freebsd, aix, hpux
advisories | CVE-2015-5416, CVE-2015-5417, CVE-2015-5418, CVE-2015-5419, CVE-2015-5420, CVE-2015-5421, CVE-2015-5422, CVE-2015-5423, CVE-2015-5424
MD5 | c822d624233777789e959ca18bfbc976
HP Security Bulletin HPSBGN03395 1
Posted Aug 24, 2015
Authored by HP | Site hp.com

HP Security Bulletin HPSBGN03395 1 - A potential security vulnerability has been identified with HP KeyView running on HP-UX, Linux, Solaris, Windows, FreeBSD, and AIX. The vulnerability could be exploited remotely to allow execution of code. Revision 1 of this advisory.

tags | advisory
systems | linux, windows, solaris, freebsd, aix, hpux
advisories | CVE-2015-5416, CVE-2015-5417, CVE-2015-5418, CVE-2015-5419, CVE-2015-5420, CVE-2015-5421, CVE-2015-5422, CVE-2015-5423, CVE-2015-5424
MD5 | c822d624233777789e959ca18bfbc976
FreeBSD Security Advisory - expat Integer Overflows
Posted Aug 18, 2015
Site security.freebsd.org

FreeBSD Security Advisory - Multiple integer overflows have been discovered in the XML_GetBuffer() function in the expat library.

tags | advisory, overflow
systems | freebsd
advisories | CVE-2015-1283
MD5 | 39f153ba79b5a361579f0662dcc7d316
FreeBSD Security Advisory - patch Shell Injection
Posted Aug 6, 2015
Site security.freebsd.org

FreeBSD Security Advisory - Due to insufficient sanitization of the input patch stream, it is possible for a patch file to cause patch(1) to pass certain ed(1) scripts to the ed(1) editor, which would run commands.

tags | advisory
systems | freebsd
advisories | CVE-2015-1418
MD5 | 7d000c1ccb5024987c1efad09f675ec3
FreeBSD Security Advisory - routed Denial Of Service
Posted Aug 6, 2015
Site security.freebsd.org

FreeBSD Security Advisory - The input path in routed(8) will accept queries from any source and attempt to answer them. However, the output path assumes that the destination address for the response is on a directly connected network.

tags | advisory
systems | freebsd
advisories | CVE-2015-5674
MD5 | f4408b196586985c3c08d26b1bcf2fc7
FreeBSD Security Advisory - patch Shell Injection
Posted Jul 28, 2015
Authored by Martin Natano | Site security.freebsd.org

FreeBSD Security Advisory - Due to insufficient sanitization of the input patch stream, it is possible for a patch file to cause patch to run commands in addition to the desired SCCS or RCS commands.

tags | advisory
systems | freebsd
advisories | CVE-2015-1416
MD5 | 64a06be92c3ae6e37bf4d6ed19120232
FreeBSD Security Advisory - BIND Denial Of Service
Posted Jul 28, 2015
Site security.freebsd.org

FreeBSD Security Advisory - A remote attacker can trigger a crash of a name server. Both recursive and authoritative servers are affected, and the exposure can not be mitigated by either ACLs or configuration options limiting or denying service because the exploitable code occurs early in the packet handling, before checks enforcing those boundaries.

tags | advisory, remote
systems | freebsd
advisories | CVE-2015-5477
MD5 | 2047cc3417a329326545ba6278d4797b
FreeBSD Security Advisory - OpenSSH Record Check
Posted Jul 28, 2015
Site security.freebsd.org

FreeBSD Security Advisory - OpenSSH clients does not correctly verify DNS SSHFP records when a server offers a certificate. OpenSSH servers which are configured to allow password authentication using PAM (default) would allow many password attempts.

tags | advisory
systems | freebsd
advisories | CVE-2014-2653, CVE-2015-5600
MD5 | 8cb4a72bf773c38e284608edf83d9522
FreeBSD Security Advisory - TCP Reassembly Resource Exhaustion
Posted Jul 28, 2015
Authored by Patrick Kelsey | Site security.freebsd.org

FreeBSD Security Advisory - There is a mistake with the introduction of VNET, which converted the global limit on the number of segments that could belong to reassembly queues into a per-VNET limit. Because mbufs are allocated from a global pool, in the presence of a sufficient number of VNETs, the total number of mbufs attached to reassembly queues can grow to the total number of mbufs in the system, at which point all network traffic would cease. An attacker who can establish concurrent TCP connections across a sufficient number of VNETs and manipulate the inbound packet streams such that the maximum number of mbufs are enqueued on each reassembly queue can cause mbuf cluster exhaustion on the target system, resulting in a Denial of Service condition. As the default per-VNET limit on the number of segments that can belong to reassembly queues is 1/16 of the total number of mbuf clusters in the system, only systems that have 16 or more VNET instances are vulnerable.

tags | advisory, denial of service, tcp
systems | freebsd
advisories | CVE-2015-1417
MD5 | a66a42619ffbd61e012b14370befb044
FreeBSD Security Advisory - Resource Exhaustion
Posted Jul 22, 2015
Authored by Jonathan Looney, Lawrence Stewart | Site security.freebsd.org

FreeBSD Security Advisory - TCP connections transitioning to the LAST_ACK state can become permanently stuck due to mishandling of protocol state in certain situations, which in turn can lead to accumulated consumption and eventual exhaustion of system resources, such as mbufs and sockets.

tags | advisory, tcp, protocol
systems | freebsd
advisories | CVE-2015-5358
MD5 | 0d608aa586db4fcb9ecb0d706aca3e35
Western Digital Arkeia Remote Code Execution
Posted Jul 13, 2015
Authored by xistence | Site metasploit.com

This Metasploit module exploits a code execution flaw in Western Digital Arkeia version 11.0.12 and below. The vulnerability exists in the 'arkeiad' daemon listening on TCP port 617. Because there are insufficient checks on the authentication of all clients, this can be bypassed. Using the ARKFS_EXEC_CMD operation it's possible to execute arbitrary commands with root or SYSTEM privileges. The daemon is installed on both the Arkeia server as well on all the backup clients. The module has been successfully tested on Windows, Linux, OSX, FreeBSD and OpenBSD.

tags | exploit, arbitrary, root, tcp, code execution
systems | linux, windows, freebsd, openbsd, apple
MD5 | ebae27aa7c351921d3e11dbd4a53e360
FreeBSD Security Advisory - OpenSSL Certificate Forgery
Posted Jul 10, 2015
Authored by Adam Langley, David Benjamin | Site security.freebsd.org

FreeBSD Security Advisory - During certificate verification, OpenSSL will attempt to find an alternative certificate chain if the first attempt to build such a chain fails, unless the application explicitly specifies X509_V_FLAG_NO_ALT_CHAINS. An error in the implementation of this logic could erroneously mark certificate as trusted when they should not. An attacker could cause certain checks on untrusted certificates, such as the CA (certificate authority) flag, to be bypassed, which would enable them to use a valid leaf certificate to act as a CA and issue an invalid certificate.

tags | advisory
systems | freebsd
advisories | CVE-2015-1793
MD5 | 26ed640fe93813ad02963f1321eb4af2
FreeBSD Security Advisory - BIND Denial Of Service
Posted Jul 8, 2015
Site security.freebsd.org

FreeBSD Security Advisory - BIND 9 is an implementation of the Domain Name System (DNS) protocol. The named daemon is an Internet Domain Name Server. The libdns library is a library of DNS protocol support functions. Due to a software defect, specially constructed zone data could cause named to crash with an assertion failure and rejecting the malformed query when DNSSEC validation is enabled. An attacker who can cause specific queries to be sent to a nameserver could cause named to crash, resulting in a denial of service.

tags | advisory, denial of service, protocol
systems | freebsd
advisories | CVE-2015-4620
MD5 | 300c3c2b2e911068922e33304424c3ae
FreeBSD Security Advisory - OpenSSL
Posted Jun 12, 2015
Site security.freebsd.org

FreeBSD Security Advisory - A vulnerability in the TLS protocol would allow a man-in-the-middle attacker to downgrade vulnerable TLS connections using ephemeral Diffie-Hellman key exchange to 512-bit export-grade cryptography. This vulnerability is also known as Logjam. When processing an ECParameters structure OpenSSL enters an infinite loop if the curve specified is over a specially malformed binary polynomial field. When verifying a signedData message the CMS code can enter an infinite loop if presented with an unknown hash function OID. Various other issues have also been addressed.

tags | advisory, protocol
systems | freebsd
advisories | CVE-2015-1788, CVE-2015-1789, CVE-2015-1790, CVE-2015-1791, CVE-2015-1792, CVE-2015-4000
MD5 | 3fb8aa902f8c2dc20a490d919de2a423
FreeBSD Security Advisory - ntp Issues
Posted Apr 8, 2015
Site security.freebsd.org

FreeBSD Security Advisory - The ntpd(8) daemon is an implementation of the Network Time Protocol (NTP) used to synchronize the time of a computer system to a reference time source. The vallen packet value is not validated in several code paths in ntp_crypto.c. When ntpd(8) is configured to use a symmetric key to authenticate a remote NTP server/peer, it checks if the NTP message authentication code (MAC) in received packets is valid, but not that there actually is any MAC included, and packets without a MAC are accepted as if they had a valid MAC. NTP state variables are updated prior to validating the received packets.

tags | advisory, remote, protocol
systems | freebsd
advisories | CVE-2014-9297, CVE-2015-1798, CVE-2015-1799
MD5 | 6b5b2146b2f3da2a6ba4207a596fe02f
FreeBSD Security Advisory - IPv6 Denial Of Service
Posted Apr 8, 2015
Authored by Dennis Ljungmark | Site security.freebsd.org

FreeBSD Security Advisory - The Neighbor Discover Protocol allows a local router to advertise a suggested Current Hop Limit value of a link, which will replace Current Hop Limit on an interface connected to the link on the FreeBSD system. When the Current Hop Limit (similar to IPv4's TTL) is small, IPv6 packets may get dropped before they reached their destinations. By sending specifically crafted Router Advertisement packets, an attacker on the local network can cause the FreeBSD system to lose the ability to communicate with another IPv6 node on a different network.

tags | advisory, local, protocol
systems | freebsd
advisories | CVE-2015-2923
MD5 | 176dd68fb5724f792db55625e1878c68
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