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<h2 id=OpenBSD>
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<i>Open</i><b>BSD</b></a>
5.9 Errata
</h2>
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For errata on a certain release, click below:<br>
<a href="errata20.html">2.0</a>,
<a href="errata21.html">2.1</a>,
<a href="errata22.html">2.2</a>,
<a href="errata23.html">2.3</a>,
<a href="errata24.html">2.4</a>,
<a href="errata25.html">2.5</a>,
<a href="errata26.html">2.6</a>,
<a href="errata27.html">2.7</a>,
<a href="errata28.html">2.8</a>,
<a href="errata29.html">2.9</a>,
<a href="errata30.html">3.0</a>,
<a href="errata31.html">3.1</a>,
<a href="errata32.html">3.2</a>,
<a href="errata33.html">3.3</a>,
<a href="errata34.html">3.4</a>,
<a href="errata35.html">3.5</a>,
<br>
<a href="errata36.html">3.6</a>,
<a href="errata37.html">3.7</a>,
<a href="errata38.html">3.8</a>,
<a href="errata39.html">3.9</a>,
<a href="errata40.html">4.0</a>,
<a href="errata41.html">4.1</a>,
<a href="errata42.html">4.2</a>,
<a href="errata43.html">4.3</a>,
<a href="errata44.html">4.4</a>,
<a href="errata45.html">4.5</a>,
<a href="errata46.html">4.6</a>,
<a href="errata47.html">4.7</a>,
<a href="errata48.html">4.8</a>,
<a href="errata49.html">4.9</a>,
<a href="errata50.html">5.0</a>,
<a href="errata51.html">5.1</a>,
<br>
<a href="errata52.html">5.2</a>,
<a href="errata53.html">5.3</a>,
<a href="errata54.html">5.4</a>,
<a href="errata55.html">5.5</a>,
<a href="errata56.html">5.6</a>,
<a href="errata57.html">5.7</a>,
<a href="errata58.html">5.8</a>,
<a href="errata60.html">6.0</a>,
<a href="errata61.html">6.1</a>,
<a href="errata62.html">6.2</a>,
<a href="errata63.html">6.3</a>,
<a href="errata64.html">6.4</a>,
<a href="errata65.html">6.5</a>,
<a href="errata66.html">6.6</a>,
<a href="errata67.html">6.7</a>,
<a href="errata68.html">6.8</a>,
<br>
<a href="errata69.html">6.9</a>,
<a href="errata70.html">7.0</a>,
<a href="errata71.html">7.1</a>,
<a href="errata72.html">7.2</a>,
<a href="errata73.html">7.3</a>,
<a href="errata74.html">7.4</a>,
<a href="errata75.html">7.5</a>,
<a href="errata76.html">7.6</a>,
<a href="errata77.html">7.7</a>.
<hr>

<p>
Patches for the OpenBSD base system are distributed as unified diffs.
Each patch is cryptographically signed with the
<a href="https://man.openbsd.org/OpenBSD-5.9/signify.1">signify(1)</a> tool and contains
usage instructions.
All the following patches are also available in one
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9.tar.gz">tar.gz file</a>
for convenience.

<p>
Patches for supported releases are also incorporated into the
<a href="stable.html">-stable branch</a>.

<hr>

<ul>

<li id="p001_sshd">
<strong>001: SECURITY FIX: March 10, 2016</strong>
&nbsp; <i>All architectures</i><br>
<a href="https://www.openssh.com/txt/x11fwd.adv">
Lack of credential sanitization allows injection of commands to xauth(1).</a>
<br>
Prevent this problem immediately by not using the "X11Forwarding" feature
(which is disabled by default)
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/001_sshd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p002_in6bind">
<strong>002: SECURITY FIX: March 16, 2016</strong>
&nbsp; <i>All architectures</i><br>
Insufficient checks in IPv6 socket binding and UDP IPv6 option
processing allow a local user to send UDP packets with a source
(IPv6 address + port) already reserved by another user.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/002_in6bind.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p003_pledge">
<strong>003: RELIABILITY FIX: March 16, 2016</strong>
&nbsp; <i>All architectures</i><br>
Incorrect path processing in pledge_namei() could result in unexpected
program termination of pledge(2)'d programs.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/003_pledge.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p004_mbuf">
<strong>004: RELIABILITY FIX: April 30, 2016</strong>
&nbsp; <i>All architectures</i><br>
A problem in m_dup_pkt() can result in kernel crashes with carp(4).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/004_mbuf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p005_crypto">
<strong>005: SECURITY FIX: May 3, 2016</strong>
&nbsp; <i>All architectures</i><br>
Fix issues in the libcrypto library.
Refer to <a href="https://www.openssl.org/news/secadv/20160503.txt">the advisory</a>.
<ul>
<li>Memory corruption in the ASN.1 encoder (CVE-2016-2108)
<li>Padding oracle in AES-NI CBC MAC check (CVE-2016-2107)
<li>EVP_EncodeUpdate overflow (CVE-2016-2105)
<li>EVP_EncryptUpdate overflow (CVE-2016-2106)
<li>ASN.1 BIO excessive memory allocation (CVE-2016-2109)
</ul>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/005_crypto.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p006_smtpd">
<strong>006: RELIABILITY FIX: May 16, 2016</strong>
&nbsp; <i>All architectures</i><br>
Fix issues in smtpd.
<ul>
  <li>Fix logic issue in smtp state machine that can lead to invalid state and result in crash.
  <li>Plug file pointer leak that can lead to resources exhaustion and result in crash.
</ul>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/006_smtpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p007_uvideo">
<strong>007: SECURITY FIX: May 17, 2016</strong>
&nbsp; <i>All architectures</i><br>
Insufficient checks in the uvideo(4) V4L2 ioctl handling leak kernel
memory contents to a local user.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/007_uvideo.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p008_bnx">
<strong>008: RELIABILITY FIX: May 18, 2016</strong>
&nbsp; <i>All architectures</i><br>
Fix issue in the bnx(4) ethernet driver that could cause data corruption.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/008_bnx.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p009_crypto">
<strong>009: RELIABILITY FIX: May 29, 2016</strong>
&nbsp; <i>All architectures</i><br>
Fix a bug in the libcrypto library when parsing certain ASN.1 elements.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/009_crypto.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p010_libexpat">
<strong>010: SECURITY FIX: June 2, 2016</strong>
&nbsp; <i>All architectures</i><br>
Fix issues in the libexpat library to prevent multiple integer and
buffer overflows.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/010_libexpat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p011_crypto">
<strong>011: SECURITY FIX: June 6, 2016</strong>
&nbsp; <i>All architectures</i><br>
Correct a problem that prevents the DSA signing algorithm from running
in constant time even if the flag BN_FLG_CONSTTIME is set.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/011_crypto.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p012_crypto">
<strong>012: SECURITY FIX: June 27, 2016</strong>
&nbsp; <i>All architectures</i><br>
Correct a problem that could result in incorrect parsing/encoding of times in OCSP messages.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/012_crypto.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p013_splice">
<strong>013: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
Splicing sockets in a loop could cause a kernel spin.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/013_splice.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p014_unp">
<strong>014: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
Multiple processes exiting with a fd-passing control message on a
shared socket could crash the system.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/014_unp.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p015_dirent">
<strong>015: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
ufs_readdir failed to limit size of memory allocation, leading to panics.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/015_dirent.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p016_mmap">
<strong>016: SECURITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
The mmap extension __MAP_NOFAULT could overcommit resources and crash
the system.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/016_mmap.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p017_arp">
<strong>017: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
A race occurring in the unlocked ARP input path can lead to a kernel
NULL dereference.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/017_arp.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p018_timeout">
<strong>018: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
Tick counting overflows could cause a kernel crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/018_timeout.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p019_kevent">
<strong>019: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
Invalid file descriptor use with kevent(2) could lead to a kernel crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/019_kevent.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p020_amap">
<strong>020: RELIABILITY FIX: July 14, 2016</strong>
&nbsp; <i>All architectures</i><br>
Unchecked parameters and integer overflows in the amap allocation routines
could cause malloc(9) to either not allocate enough memory, leading to memory
corruption, or to trigger a "malloc: allocation too large" panic.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/020_amap.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p021_relayd">
<strong>021: RELIABILITY FIX: July 25, 2016</strong>
&nbsp; <i>All architectures</i><br>
When signaling an error to an HTTP relay client, the connection can be
terminated prematurely, leading to a crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/021_relayd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p022_sysctl">
<strong>022: RELIABILITY FIX: August 2, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
A missing NULL check in sysctl code results in a crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/022_sysctl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p023_uvmisavail">
<strong>023: RELIABILITY FIX: August 2, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Missing overflow checks in uvm may result in panics.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p024_perl">
<strong>024: SECURITY FIX: August 6, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Don't look in the current working directory for perl modules to load.
See the <a href="https://marc.info/?l=perl5-porters&amp;m=146945269625067&amp;w=2">
perl5-porters announcement</a> for details.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/024_perl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p025_relayd">
<strong>025: RELIABILITY FIX: August 6, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Improve relayd's parsing of the Host-header by following RFC 7230
Section 5.4 more strictly.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/025_relayd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p026_wsfont">
<strong>026: RELIABILITY FIX: September 17, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Limit the number of wscons fonts that can be loaded into the kernel.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/026_wsfont.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p027_libssl">
<strong>027: RELIABILITY FIX: September 22, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Avoid unbounded memory growth in libssl, which can be triggered by a TLS
client repeatedly renegotiating and sending OCSP Status Request TLS extensions.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/027_libssl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p028_libssl">
<strong>028: SECURITY FIX: September 22, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Avoid falling back to a weak digest for (EC)DH when using SNI with libssl.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/028_libssl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p029_xorg_libs">
<strong>029: SECURITY FIX: October 4, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Fix a number of issues in the way various X client libraries handle
server responses.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/029_xorg_libs.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p030_ssh_kexinit">
<strong>030: RELIABILITY FIX: October 10, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
A protocol parsing bug in sshd can lead to unauthenticated memory
and CPU consumption.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/030_ssh_kexinit.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p031_smtpd.patch">
<strong>031: RELIABILITY FIX: October 13, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
A logic issue in smtpd's header parsing can cause SMTP sessions to hang.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/031_smtpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p032_libssl.patch">
<strong>032: RELIABILITY FIX: November 5, 2016</strong>
&nbsp; <i>All architectures</i>
<br>
Avoid continual processing of an unlimited number of TLS records.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/032_libssl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p033_libcrypto.patch">
<strong>033: SECURITY FIX: January 5, 2017</strong>
&nbsp; <i>All architectures</i>
<br>
Avoid possible side-channel leak of ECDSA private keys when signing.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/033_libcrypto.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p034_httpd.patch">
<strong>034: RELIABILITY FIX: January 31, 2017</strong>
&nbsp; <i>All architectures</i>
<br>
A bug in the processing of range heanders in httpd can lead to memory
exhaustion and a crash of httpd. This patch disables range heander
processing.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/034_httpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p035_net80211.patch">
<strong>035: SECURITY FIX: March 1, 2017</strong>
&nbsp; <i>All architectures</i>
<br>
WiFi clients using WPA1 or WPA2 are vulnerable to a man-in-the-middle attack
by rogue access points.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/035_net80211.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p036_pf.patch">
<strong>036: RELIABILITY FIX: March 9, 2017</strong>
&nbsp; <i>All architectures</i>
<br>
Prevent integer overflow in PF when calculating the adaptive timeout,
causing spuriously expired states under pressure.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/036_pf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

<li id="p037_exec_elf.patch">
<strong>037: SECURITY FIX: March 20, 2017</strong>
&nbsp; <i>All architectures</i>
<br>
ELF auxiliary vector storage leaks piece of kernel stack.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/037_exec_elf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>

</ul>

<hr>