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<h2 id=OpenBSD>
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<i>Open</i><b>BSD</b></a>
7.4 Errata
</h2>
<hr>
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="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="errata65.html">6.5</a>,
<a href="errata66.html">6.6</a>,
<a href="errata67.html">6.7</a>,
<br>
<a href="errata68.html">6.8</a>,
<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="errata75.html">7.5</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-7.4/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/7.4.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>.
<hr>
<ul>
<li id="p001_xserver">
<strong>001: SECURITY FIX: October 25, 2023</strong>
<i>All architectures</i>
<br>
Fix several input validation errors in the X server.
CVE-2023-5367 CVE-2023-5380 CVE-2023-5574
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/001_xserver.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p002_msplit">
<strong>002: SECURITY FIX: October 25, 2023</strong>
<i>All architectures</i>
<br>
A network buffer that had to be split at certain length could crash
the kernel.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/002_msplit.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p003_patch">
<strong>003: RELIABILITY FIX: November 21, 2023</strong>
<i>All architectures</i>
<br>
patch(1) with explicit patchfile did not work in 7.4 due to overeager
unveil(2) restrictions.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/003_patch.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p004_ospfd">
<strong>004: RELIABILITY FIX: November 21, 2023</strong>
<i>All architectures</i>
<br>
Simple passwords which were 8 characters long caused ospfd(8) to
send out packets with invalid checksum.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/004_ospfd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p005_tmux">
<strong>005: RELIABILITY FIX: November 21, 2023</strong>
<i>All architectures</i>
<br>
Overlong sequences of UTF-8 combining characters could crash tmux(1).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/005_tmux.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p006_httpd">
<strong>006: RELIABILITY FIX: November 21, 2023</strong>
<i>All architectures</i>
<br>
httpd(8): Avoid a NULL dereference when handling a malformed fastcgi request.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/006_httpd.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p007_perl">
<strong>007: SECURITY FIX: November 29, 2023</strong>
<i>All architectures</i>
<br>
A crafted regular expression when compiled by perl can cause a
one-byte attacker controlled buffer overflow in a heap allocated
buffer. CVE-2023-47038
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/007_perl.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p008_vmm">
<strong>008: RELIABILITY FIX: December 10, 2023</strong>
<i>amd64</i>
<br>
vmm(4) restored stale GDTR & TR values on vm exit which could lead to
memory corruption or kernel deadlocks.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/008_vmm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p009_pf">
<strong>009: RELIABILITY FIX: December 10, 2023</strong>
<i>All architectures</i>
<br>
A race condition between pf(4)'s processing of packets and expiration of
packet states may cause a kernel panic.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p010_xserver">
<strong>010: SECURITY FIX: December 14, 2023</strong>
<i>All architectures</i>
<br>
Fix out of bounds memory accesses in XRandR and XKB X server extensions.
CVE-2023-6377 CVE-2023-6478
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/010_xserver.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p011_ssh">
<strong>011: SECURITY FIX: December 18, 2023</strong>
<i>All architectures</i>
<br>
An SSH protocol weakness (the Terrapin Attack) exists that allows an
on-path adversary to disable keystroke timing obfuscation.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/011_ssh.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p012_xserver">
<strong>012: SECURITY FIX: January 16, 2024</strong>
<i>All architectures</i>
<br>
Fix multiple xserver heap buffer overflows, out of bounds memory accesses and
memory corruption.
CVE-2023-6816 CVE-2024-0229 CVE-2024-21885 CVE-2024-21886
CVE-2024-0408 CVE-2024-0409
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/012_xserver.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p013_unbound">
<strong>013: SECURITY FIX: February 13, 2024</strong>
<i>All architectures</i>
<br>
DNSSEC protocol vulnerabilities have been discovered that render
various DNSSEC validators victims of Denial Of Service while trying
to validate specially crafted DNSSEC responses.
Fix CVE-2023-50387 and CVE-2023-50868 in unwind(8) and unbound(8).
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/013_unbound.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p014_vmm">
<strong>014: SECURITY FIX: February 29, 2024</strong>
<i>amd64</i>
<br>
vmm(4) did not restore GDTR limits properly on Intel (VMX) CPUs.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/014_vmm.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p015_expat">
<strong>015: SECURITY FIX: March 18, 2024</strong>
<i>All architectures</i>
<br>
In libexpat fix billion laughs attack vulnerability CVE-2024-28757.
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/015_expat.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
<li id="p016_xserver">
<strong>016: SECURITY FIX: April 8, 2024</strong>
<i>All architectures</i>
<br>
Fix multiple heap buffer overread and data leakage in the X11 server
Xi extension and use after free in the Render extension.
CVE-2024-31080 CVE-2024-31081 CVE-2024-31083
<br>
<a href="https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/016_xserver.patch.sig">
A source code patch exists which remedies this problem.</a>
<p>
</ul>
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