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<i>Open</i><b>BSD</b></a>
6.5 Errata
</h2>
<hr>
For errata on a certain release, click below:<br>
<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>,
<a href="errata36.html">3.6</a>,
<br>
<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>,
<a href="errata52.html">5.2</a>,
<br>
<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="errata59.html">5.9</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="errata66.html">6.6</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-6.5/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/6.5.tar.gz">tar.gz file</a>
for convenience.
<p>
Alternatively, the <a href="https://man.openbsd.org/syspatch">syspatch(8)</a>
utility can be used to apply binary updates on the following architectures:
amd64, i386, arm64.
<p>
Patches for supported releases are also incorporated into the
<a href="stable.html">-stable branch</a>, which is maintained for one year
after release.
<hr>
<ul>
<li id="p001_rip6cksum">
<strong>001: RELIABILITY FIX: May 3, 2019</strong>
<i>All architectures</i>
<br>
If a userland program sets the IPv6 checksum offset on a raw socket,
an incoming packet could crash the kernel. ospf6d is such a program.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/001_rip6cksum.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p002_srtp">
<strong>002: RELIABILITY FIX: May 16, 2019</strong>
<i>All architectures</i>
<br>
LibreSSL servers did not provide an SRTP profile, so DTLS negotiation failed.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/002_srtp.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p003_mds">
<strong>003: SECURITY FIX: May 29, 2019</strong>
<i>amd64</i>
<br>
Intel CPUs have a cross privilege side-channel attack (MDS).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/003_mds.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p004_bgpd">
<strong>004: RELIABILITY FIX: June 10, 2019</strong>
<i>All architectures</i>
<br>
Several issues were corrected in bgpd: "network" statements with no fixed
prefix were incorrectly removed when configuration was reloaded, "export
default-route" did not work, and "network 0.0.0.0/0" could not be used
in some cases.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/004_bgpd.patch.sig">
A source code patch exists which remedies these problems.</a>
<p>
<li id="p005_libssl">
<strong>005: RELIABILITY FIX: June 10, 2019</strong>
<i>All architectures</i>
<br>
TLS handshakes fail if a client supporting TLS 1.3 tries to connect to
an OpenBSD server and sends a key share extension that does not include
X25519.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/005_libssl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p006_tcpsack">
<strong>006: RELIABILITY FIX: July 25, 2019</strong>
<i>All architectures</i>
<br>
By creating long chains of TCP SACK holes, an attacker could possibly
slow down the system temporarily.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p007_smtpd">
<strong>007: RELIABILITY FIX: August 2, 2019</strong>
<i>All architectures</i>
<br>
smtpd can crash on excessively large input, causing a denial of service.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/007_smtpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p008_swapgs">
<strong>008: SECURITY FIX: August 9, 2019</strong>
<i>amd64</i>
<br>
Intel CPUs have another cross privilege side-channel attack. (SWAPGS)
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/008_swapgs.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p009_resume">
<strong>009: RELIABILITY FIX: September 2, 2019</strong>
<i>amd64</i>
<br>
Resume forgot to restore MSR/PAT configuration.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/009_resume.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p010_frag6ecn">
<strong>010: RELIABILITY FIX: September 2, 2019</strong>
<i>All architectures</i>
<br>
When processing ECN bits on incoming IPv6 fragments, the kernel
could crash. Per default pf fragment reassemble prevents the crash.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/010_frag6ecn.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p011_expat">
<strong>011: SECURITY FIX: September 14, 2019</strong>
<i>All architectures</i>
<br>
Libexpat 2.2.6 was affected by the heap overflow CVE-2019-15903.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/011_expat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p012_sysupgrade">
<strong>012: RELIABILITY FIX: October 3, 2019</strong>
<i>All architectures</i>
<br>
The sysupgrade utility can be used to upgrade the system to the next
release or to a new snapshot.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/012_sysupgrade.patch.sig">
A source code patch exists which adds this utility.</a>
<p>
<li id="p013_unbound">
<strong>013: RELIABILITY FIX: October 5, 2019</strong>
<i>All architectures</i>
<br>
Specially crafted queries may crash unwind and unbound.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/013_unbound.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p014_dhcpd">
<strong>014: SECURITY FIX: October 5, 2019</strong>
<i>All architectures</i>
<br>
dhcpd leaks 4 bytes of stack to the network.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/014_dhcpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p015_net80211">
<strong>015: RELIABILITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
The kernel could crash due to a NULL pointer dereference in net80211.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/015_net80211.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p016_sysupgrade">
<strong>016: RELIABILITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
A new kernel may require newer firmware images when using sysupgrade.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/016_sysupgrade.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p017_ifioctl">
<strong>017: SECURITY FIX: November 16, 2019</strong>
<i>All architectures</i>
<br>
A regular user could change some network interface parameters due
to missing checks in the ioctl(2) system call.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/017_ifioctl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p018_inteldrm">
<strong>018: SECURITY FIX: November 22, 2019</strong>
<i>i386 and amd64</i>
<br>
A local user could cause the system to hang by reading specific
registers when Intel Gen8/Gen9 graphics hardware is in a low power state.
A local user could perform writes to memory that should be blocked with
Intel Gen9 graphics hardware.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/018_inteldrm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p019_mesa">
<strong>019: SECURITY FIX: November 22, 2019</strong>
<i>All architectures</i>
<br>
Shared memory regions used by some Mesa drivers had permissions which
allowed others to access that memory.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/019_mesa.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p020_mesaxlock">
<strong>020: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
Environment-provided paths are used for dlopen() in mesa, resulting in
escalation to the auth group in xlock(1).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/020_mesaxlock.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p021_libcauth">
<strong>021: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
libc's authentication layer performed insufficient username validation.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/021_libcauth.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p022_xenodm">
<strong>022: SECURITY FIX: December 4, 2019</strong>
<i>All architectures</i>
<br>
xenodm uses the libc authentication layer incorrectly.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/022_xenodm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p023_suauth">
<strong>023: SECURITY FIX: December 8, 2019</strong>
<i>All architectures</i>
<br>
A user can log in with a different user's login class.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/023_suauth.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p024_ldso">
<strong>024: SECURITY FIX: December 11, 2019</strong>
<i>All architectures</i>
<br>
ld.so may fail to remove the LD_LIBRARY_PATH environment variable for
set-user-ID and set-group-ID executables in low memory conditions.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/024_ldso.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p025_eret">
<strong>025: SECURITY FIX: December 18, 2019</strong>
<i>arm64</i>
<br>
ARM64 CPUs speculatively execute instructions after ERET.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/025_eret.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p026_ftp">
<strong>026: SECURITY FIX: December 20, 2019</strong>
<i>All architectures</i>
<br>
ftp(1) will follow remote redirects to local files.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/026_ftp.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p027_ripd">
<strong>027: SECURITY FIX: December 20, 2019</strong>
<i>All architectures</i>
<br>
ripd(8) fails to validate authentication lengths.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/027_ripd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p028_inteldrmctx">
<strong>028: SECURITY FIX: January 17, 2020</strong>
<i>i386 and amd64</i>
<br>
Execution Unit state was not cleared on context switch with Intel Gen9
graphics hardware.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/028_inteldrmctx.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p029_smtpd_tls">
<strong>029: RELIABILITY FIX: January 30, 2020</strong>
<i>All architectures</i>
<br>
smtpd can crash on opportunistic TLS downgrade, causing a denial of service.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/029_smtpd_tls.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p030_smtpd_exec">
<strong>030: SECURITY FIX: January 30, 2020</strong>
<i>All architectures</i>
<br>
An incorrect check allows an attacker to trick mbox delivery into executing
arbitrary commands as root and lmtp delivery into executing arbitrary commands
as an unprivileged user.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/030_smtpd_exec.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
</ul>
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