OpenBSD 5.6 Errata

Patches for the OpenBSD base system are distributed as unified diffs. Each patch is cryptographically signed with the signify(1) tool and contains usage instructions. All the following patches are also available in one tar.gz file for convenience.

Patches for supported releases are also incorporated into the -stable branch.

• 001: RELIABILITY FIX: September 5, 2014   All architectures
  Incorrect RX ring computation leads to panics under load with bge(4), em(4) and ix(4).
  A source code patch exists which remedies this problem.

• 002: RELIABILITY FIX: October 1, 2014   All architectures
  If IPv6 autoconf is active on an interface and the autoconfprivacy extension is used, redundant addresses are added whenever an autoconfprivacy address expires. The autoconfprivacy extension is used by default and can be disabled with ifconfig(8) as a workaround:

  # ifconfig em0 -autoconfprivacy
  

  A source code patch exists which remedies this problem.

• 003: SECURITY FIX: October 1, 2014   All architectures
  nginx can reuse cached SSL sessions in unrelated contexts, allowing virtual host confusion attacks in some configurations. This issue was assigned CVE-2014-3616.
  A source code patch exists which remedies this problem.

• 004: RELIABILITY FIX: October 20, 2014   All architectures
  Executable headers with an unaligned address will trigger a kernel panic.
  A source code patch exists which remedies this problem.

• 005: SECURITY FIX: October 20, 2014   All architectures
  This patch disables the SSLv3 protocol by default.

  Applications depending on SSLv3 may need to be recompiled with

      SSL_CTX_clear_option(ctx, SSL_OP_NO_SSLv3);

  but we recommend against the continued use of this obsolete protocol.

  A source code patch exists which remedies this problem.

• 006: RELIABILITY FIX: November 17, 2014   All architectures
  Certain http requests can crash relayd.
  A source code patch exists which remedies this problem.

• 007: RELIABILITY FIX: November 17, 2014   All architectures
  A PF rule using an IPv4 address followed by an IPv6 address and then a dynamic address, e.g. "pass from {192.0.2.1 2001:db8::1} to (pppoe0)", will have an incorrect /32 mask applied to the dynamic address.
  A source code patch exists which remedies this problem.

• 008: RELIABILITY FIX: November 17, 2014   All architectures
  Querying an invalid hostname with gethostbyname(3) could cause a NULL deref.
  A source code patch exists which remedies this problem.

• 009: RELIABILITY FIX: November 18, 2014   All architectures
  httpd was developed very rapidly in the weeks before 5.6 release, and it has a few flaws. It would be nice to get these flaws fully remediated before the next release, and that requires the community to want to use it. Therefore here is a "jumbo" patch that brings in the most important fixes.
  A source code patch exists which remedies this problem.
  Unfortunately the source tree found on the CD set contains a slightly different checkout, from just before the release was finished and is missing a few httpd commits. Therefore, the patch above will not apply correctly. Users are encouraged to use cvs to get the latest httpd sources if interested.

• 010: RELIABILITY FIX: December 5, 2014   All architectures
  Several bugs were fixed that allowed a crash from remote when an active pipex session exists.
  A source code patch exists which remedies this problem.

• 011: RELIABILITY FIX: December 5, 2014   All architectures
  An incorrect memcpy call would result in corrupted MAC addresses when using PPPOE.
  A source code patch exists which remedies this problem.

• 012: RELIABILITY FIX: December 9, 2014   All architectures
  Fix a denial of service where a malicious authority could make the resolver chase an endless series of delegations. (CVE-2014-8602)
  A source code patch exists which remedies this problem.

• 013: RELIABILITY FIX: December 9, 2014   All architectures
  Missing memory barriers in virtio(4) can lead to hangs with virtio devices, like vio(4) and vioblk(4).
  A source code patch exists which remedies this problem.

• 014: SECURITY FIX: December 9, 2014   All architectures
  One year after Ilja van Sprundel discovered and reported a large number of issues in the way the X server code base handles requests from X clients, they have been fixed.
  X Advisory
  A source code patch exists which remedies this problem.

• 015: SECURITY FIX: January 13, 2015   All architectures
  Fix CVE-2014-6272 in libevent 1.4 event buffer handling. OpenBSD base uses it for the programs: cu tmux ftp-proxy httpd ldapd relayd tftp-proxy tftpd
  Libevent Advisory
  A source code patch exists which remedies this problem.

• 016: SECURITY FIX: March 3, 2015   All architectures
  Information leak in the XkbSetGeometry request of X servers.
  For more information, see the X.org advisory.
  A source code patch exists which remedies this problem.

• 017: SECURITY FIX: March 13, 2015   All architectures
  Don't permit TLS client connections to be downgraded to weak keys.
  A source code patch exists which remedies this problem.

• 018: SECURITY FIX: March 13, 2015   All architectures
  Another fix for buffer overflows in malformed fonts.
  A source code patch exists which remedies this problem.

• 019: SECURITY FIX: March 18, 2015   All architectures
  Buffer overflows in libXfont
  For more information, see the X.org advisory.
  A source code patch exists which remedies this problem.
  Note that the instructions should read cd /usr/xenocara/lib/libXfont.

• 020: SECURITY FIX: March 19, 2015   All architectures
  Fix several crash causing defects from OpenSSL.
  These include:
  CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error
  CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp
  CVE-2015-0287 - ASN.1 structure reuse memory corruption
  CVE-2015-0288 - X509_to_X509_REQ NULL pointer deref
  CVE-2015-0289 - PKCS7 NULL pointer dereferences
  
  Several other issues did not apply or were already fixed.
  For more information, see the OpenSSL advisory.
  A source code patch exists which remedies this problem.

• 021: RELIABILITY FIX: April 17, 2015   All architectures
  Fix a logic error in smtpd handling of SNI. This could allow a remote user to crash the server or provoke a disconnect of other sessions.
  A source code patch exists which remedies this problem.

• 022: RELIABILITY FIX: April 30, 2015   All architectures
  A remote user can crash httpd by forcing the daemon to log to a file before the logging system was initialized.
  A source code patch exists which remedies this problem.

• 023: SECURITY FIX: April 30, 2015   All architectures
  Malformed binaries could trigger kernel panics or view kernel memory.
  A source code patch exists which remedies this problem.

• 024: SECURITY FIX: April 30, 2015   All architectures
  Multiple issues in tar/pax/cpio:
  • extracting a malicious archive could create files outside of the current directory without using pre-existing symlinks to 'escape', and could change the timestamps and modes on preexisting files
  • tar without -P would permit extraction of paths with ".." components
  • there was a buffer overflow in the handling of pax extension headers
  A source code patch exists which remedies this problem.

• 025: RELIABILITY FIX: June 11, 2015   All architectures
  Fix multiple reliability issues in smtpd:
  • a local user can cause smtpd to fail by writing an invalid imsg to control socket.
  • a local user can prevent smtpd from serving new requests by exhausting descriptors.
  A source code patch exists which remedies this problem.

• 026: SECURITY FIX: June 11, 2015   All architectures
  Fix several defects from OpenSSL:
  • CVE-2015-1788 - Malformed ECParameters causes infinite loop
  • CVE-2015-1789 - Exploitable out-of-bounds read in X509_cmp_time
  • CVE-2015-1792 - CMS verify infinite loop with unknown hash function
  Note that CMS was already disabled in LibreSSL. Several other issues did not apply or were already fixed and one is under review.
  For more information, see the OpenSSL advisory.
  A source code patch exists which remedies this problem.

• 027: SECURITY FIX: July 14, 2015   All architectures
  A TCP socket can become confused and not properly cleanup resources.
  A source code patch exists which remedies this problem.

• 028: RELIABILITY FIX: July 26, 2015   All architectures
  A kernel memory leak could be triggered by an unprivileged user in a failure case when using execve under systrace.
  A source code patch exists which remedies this problem.

• 029: SECURITY FIX: July 26, 2015   All architectures
  The patch utility could be made to invoke arbitrary commands via the obsolete SCCS and RCS support when processing a crafted input file. This patch deletes the SCCS and RCS support.
  A source code patch exists which remedies this problem.

• 030: SECURITY FIX: July 30, 2015   All architectures
  The patch utility could become desyncronized processing ed(1)-style diffs.
  A source code patch exists which remedies this problem.

• 031: SECURITY FIX: October 1, 2015   All architectures
  Fix multiple reliability and security issues in smtpd:
  
  • local and remote users could make smtpd crash or stop serving requests.
  • a buffer overflow in the unprivileged, non-chrooted smtpd (lookup) process could allow a local user to cause a crash or potentially execute arbitrary code.
  • a use-after-free in the unprivileged, non-chrooted smtpd (lookup) process could allow a remote attacker to cause a crash or potentially execute arbitrary code.
  • hardlink and symlink attacks allowed a local user to unset chflags or leak the first line of an arbitrary file.
  A source code patch exists which remedies this problem.

• 032: RELIABILITY FIX: October 14, 2015   All architectures
  A problem with timer kevents could result in a kernel hang (local denial of service).
  A source code patch exists which remedies this problem.

• 033: RELIABILITY FIX: October 15, 2015   All architectures
  The OBJ_obj2txt function in libcrypto contains a one byte buffer overrun and memory leak, as reported by Qualys Security.
  A source code patch exists which remedies this problem.