OpenBSD 2.9 Errata

For errata on a certain release, click below:
2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6,
3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2,
5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8,
6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5.

Patches for the OpenBSD base system are distributed as unified diffs. Each patch 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: SECURITY FIX: May 29, 2001 All architectures
The signal handlers in sendmail(8) contain code that is unsafe in the context of a signal handler. This leads to potentially serious race conditions. At the moment this is a theoretical attack only and can only be exploited on the local host (if at all).
A source code patch exists which remedies this problem.
002: SECURITY FIX: May 30, 2001 All architectures
Programs using the fts(3) routines (such as rm, find, and most programs that take a -R flag) can be tricked into changing into the wrong directory if the parent dir is changed out from underneath it. This is similar to the old fts bug but happens when popping out of directories, as opposed to descending into them.
A source code patch exists which remedies this problem. This is the second version of the patch.
003: DOCUMENTATION FIX: June 1, 2001 All architectures
The 2.9 CD cover states that XFree86 3.3.6-current is included. This is only half-true. In fact, the XFree86 included for all architectures is 4.0.3. On the i386, the 3.3.6 Xservers have also been included, because 4.0.3 still has weak support for some devices which 3.3.6 supported better.
004: RELIABILITY FIX: June 5, 2001 All architectures
isakmpd(8) will fail to use a certificate with an identity string that is exactly N * 8 bytes long.
A source code patch exists which remedies this problem.
005: RELIABILITY FIX: June 7, 2001 All architectures
pwd_mkdb(8) corrupts /etc/pwd.db when modifying an existing user.
A source code patch exists which remedies this problem.
006: SECURITY FIX: June 12, 2001 All architectures
sshd(8) allows users to delete arbitrary files named "cookies" if X11 forwarding is enabled. X11 forwarding is disabled by default.
A source code patch exists which remedies this problem.
007: SECURITY FIX: June 15, 2001 All architectures
A race condition exists in the kernel execve(2) implementation that opens a small window of vulnerability for a non-privileged user to ptrace(2) attach to a suid/sgid process.
A source code patch exists which remedies this problem.
008: RELIABILITY FIX: June 15, 2001 All architectures
twe(4) mishandles the DMA mapping resulting in a kernel panic on unaligned data transfers, induced by programs such as disklabel(8) and dump(8).
A source code patch exists which remedies this problem. This is the second version of the patch.
009: RELIABILITY FIX: Jun 23, 2001
The XF86Setup(1) configuration tool for XFree86 3.3.6 is producing corrupted /etc/XF86Config files. A source code patch exists which remedies this problem. It does so by linking XF86Setup against the XFree86 3.3.6 version of libXxf86vm.a.
When using a PS/2 keyboard with an MSI K7T Pro2A motherboard, it may be necessary to disable the "USB Keyboard Support" and "USB Mouse Support" options in the BIOS. Otherwise, the i8042 keyboard controller doesn't acknowledge commands, confusing OpenBSD.
010: RELIABILITY FIX: Jul 9, 2001
The NVIDIA driver for XFree86 4.0.3 is incorrectly restoring the text mode palette upon exit of the X server. A source code patch exists which remedies this problem. To avoid rebuilding the whole XFree86 tree, an updated binary driver is also available here. Just grab it, copy it to /usr/X11R6/lib/modules/drivers/ and restart your X server.
011: RELIABILITY FIX: July 15, 2001 All architectures
The packages(7) subsystem incorrectly accepts some package dependencies as okay (see packages-specs(7) for details).
A source code patch exists which remedies this problem. by forcing /usr/sbin/pkg to be more careful in checking version numbers.
012: SECURITY FIX: July 30, 2001 All architectures
A kernel buffer overflow exists in the NFS mount code. An attacker may use this overflow to execute arbitrary code in kernel mode. However, only users with mount(2) privileges can initiate this attack. In default installs, only super-user has mount privileges. The kern.usermount sysctl(3) controls whether other users have mount privileges.
A source code patch exists which remedies this problem.
013: SECURITY FIX: August 21, 2001 All architectures
A security hole exists in sendmail(8) that may allow an attacker on the local host to gain root privileges by specifying out-of-bounds debug parameters.
A source code patch exists which remedies this problem.
014: SECURITY FIX: August 29, 2001 All architectures
A security hole exists in lpd(8) that may allow an attacker with line printer access to gain root privileges. A machine must be running lpd to be vulnerable (OpenBSD does not start lpd by default). Only machines with line printer access (ie: listed in either /etc/hosts.lpd or /etc/hosts.equiv) may be used to mount an attack.
A source code patch exists which remedies this problem.
015: SECURITY FIX: September 11, 2001 All architectures
A security hole exists in uuxqt(8) that may allow an attacker to run arbitrary commands as user uucp and use this to gain root access. The UUCP execution daemon, uuxqt(8), has a bug in its command line parsing routine that may allow arbitrary commands to be run. Because some UUCP commands are run as root (and daemon) from cron it is possible to leverage compromise of the UUCP user to gain root.
A source code patch exists which remedies this problem.
016: SECURITY FIX: November 13, 2001 All architectures
A security issue exists in the vi.recover script that may allow an attacker to remove arbitrary zero-length files, regardless of ownership.
A source code patch exists which remedies this problem.
017: SECURITY FIX: November 28, 2001 All architectures
A security issue exists in the lpd daemon that may allow an attacker to create arbitrary new files in the root directory. Only machines with line printer access (ie: listed in either /etc/hosts.lpd or /etc/hosts.equiv) may be used to mount an attack and the attacker must have root access on the machine. OpenBSD does not start lpd in the default installation. A source code patch exists which remedies this problem.
018: INSTALL PROBLEM: Dec 11, 2001
The X binary sets shipped with OpenBSD 2.9 do not contain several files. These missing files can be added manually from the sparc tarballs after the installation:
Grab the xbase29.tgz and xshare29.tgz files found in the 2.9/sparc directory on the CD, or any FTP site. The missing files can be installed by using the following commands:
```
   # cd /; tar xzpf xbase29.tgz ./usr/X11R6/lib/X11/{rgb.txt,xdm}
   # cd /; tar xzpf xserv29.tgz ./etc/X11/xserver ./usr/X11R6/lib/X11/xserver
   # cd /usr/X11R6/bin/; ln -fs Xmac68k X
```
019: SECURITY FIX: January 17, 2002 All architectures
If the Postfix sendmail replacement is installed on a system an attacker may be able to gain root privileges on the local host via sudo(8) which runs the mailer as root with an environment inherited from the invoking user. While this is a bug in sudo it is not believed to be possible to exploit when sendmail (the mailer that ships with OpenBSD) is the mailer. As of version 1.6.5, sudo passes the mailer an environment that is not subject to influence from the invoking user.
A source code patch exists which remedies this problem.
020: SECURITY FIX: February 20, 2002 All architectures
A race condition between the ptrace(2) and execve(2) system calls allows an attacker to modify the memory contents of suid/sgid processes which could lead to compromise of the super-user account.
A source code patch exists which remedies this problem.
021: SECURITY FIX: March 8, 2002 All architectures
A local user can gain super-user privileges due to an off-by-one check in the channel forwarding code of OpenSSH.
A source code patch exists which remedies this problem.
022: RELIABILITY FIX: March 13, 2002 All architectures
Under some circumstances the zlib compression library can free dynamically allocated memory twice. This is not a security issue on OpenBSD since the BSD free(3) function detects this. There is also a kernel zlib component that may be used by pppd and IPsec. The feasibility of attacking the kernel this way is currently unknown.
A source code patch exists which remedies this problem.
023: SECURITY FIX: April 11, 2002 All architectures
mail(1) will process tilde escapes even in non-interactive mode. This can lead to a local root compromise.
A source code patch exists which remedies this problem.
024: SECURITY FIX: April 22, 2002 All architectures
A local user can gain super-user privileges due to a buffer overflow in sshd(8) if AFS has been configured on the system or if KerberosTgtPassing or AFSTokenPassing has been enabled in the sshd_config file. Ticket and token passing is not enabled by default.
A source code patch exists which remedies this problem.
025: SECURITY FIX: April 25, 2002 All architectures
A bug in sudo(8) may allow an attacker to corrupt the heap by specifying a custom prompt.
A source code patch exists which remedies this problem.
026: SECURITY FIX: May 8, 2002 All architectures
A race condition exists where an attacker could fill the file descriptor table and defeat the kernel's protection of fd slots 0, 1, and 2 for a setuid or setgid process.
A source code patch exists which remedies this problem.
027: SECURITY FIX: June 25, 2002 All architectures
A potential buffer overflow in the DNS resolver has been found.
A source code patch exists which remedies this problem.