OpenBSD 2.7 Errata

For errata on a certain release, click below:
2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.8, 2.9, 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.

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 25, 2000 All architectures
A misuse of ipf(8) keep-state rules can result in firewall rules being bypassed.
A source code patch exists which remedies this problem. It updates ipf to version 3.3.16.
002: DRIVER FIX: May 26, 2000 All architectures
The ef(4) driver will complain when adding an address with ifconfig (ifconfig: SIOCAIFADDR: Invalid argument).
A source code patch exists which remedies this problem.
003: SECURITY FIX: May 26, 2000 All architectures
It is possible to bypass the learning flag on an interface if frames go directly to the machine acting as a bridge.
A source code patch exists which remedies this problem.
004: RELIABILITY FIX: May 29, 2000 All architectures
Certain routing table modifications by the superuser could cause a system panic.
A source code patch exists which remedies this problem.
005: RELIABILITY FIX: May 29, 2000 All architectures
Parse IPv4 options more carefully. It is not yet clear if this can even be used to crash the machine remote or locally.
A source code patch exists which remedies this problem.
006: SECURITY FIX: June 6, 2000 All architectures
The non-default UseLogin feature in /etc/sshd_config is broken and should not be used. On other operating systems, it results in a hole.
Avoid use of this feature, or update to OpenSSH 2.1.1 or later if you must use it.
007: RELIABILITY FIX: June 8, 2000 All architectures
NFS exporting of CD filesystems caused a system panic.
A source code patch exists which remedies this problem.
008: RELIABILITY FIX: June 8, 2000 All architectures
Some operations in msdosfs could result in a system panic.
A source code patch exists which remedies this problem.
009: SECURITY FIX: June 9, 2000 All architectures
A serious bug in isakmpd(8) policy handling wherein policy verification could be completely bypassed in isakmpd.
A source code patch exists which remedies this problem.

010: CD DISTRIBUTION ERROR: June 15, 2000
On the 2.7 CD media, the amiga distribution contains two pairs of archives files for installation, ie:

-rw-r--r--  1 root  mirftp  20191465 Apr 29 14:27 base27.tar.gz
-rw-r--r--  1 root  mirftp  20291753 May 13 19:33 base27.tgz
-rw-r--r--  1 root  mirftp  13699507 Apr 29 14:26 comp27.tar.gz
-rw-r--r--  1 root  mirftp  13748096 May 13 19:33 comp27.tgz
-rw-r--r--  1 root  mirftp   1005376 Apr 29 14:26 etc27.tar.gz
-rw-r--r--  1 root  mirftp   1010772 May 13 19:33 etc27.tgz
-rw-r--r--  1 root  mirftp   2755567 Apr 29 14:26 game27.tar.gz
-rw-r--r--  1 root  mirftp   2755624 May 13 19:33 game27.tgz
-rw-r--r--  1 root  mirftp   5002872 Apr 29 14:26 man27.tar.gz
-rw-r--r--  1 root  mirftp   5038896 May 13 19:33 man27.tgz
-rw-r--r--  1 root  mirftp   1684356 Apr 29 14:26 misc27.tar.gz
-rw-r--r--  1 root  mirftp   1684381 May 13 19:33 misc27.tgz

The installation script will list ALL of these files. For proper operation one should install the *.tgz versions, and deselect the *.tar.gz versions.
The FTP area sets do not suffer from this problem.

011: DRIVER BUG: June 17, 2000
The an(4) Aironet Communications 4500/4800 IEEE 802.11DS driver has a bug which prevents ancontrol(8) from working correctly, instead causing a panic.
A source code patch exists which remedies this problem.
012: SECURITY FIX: June 24, 2000 All architectures
A serious bug in dhclient(8) could allow strings from a malicious dhcp server to be executed in the shell as root.
A source code patch exists which remedies this problem.
013: SECURITY FIX: June 28, 2000 All architectures
libedit would check for a .editrc file in the current directory. That behaviour is not nice; this does not turn into a security problem in any real world situation that we know of, but a patch is available anyways.
A source code patch exists which remedies this problem.
014: DRIVER BUG: June 30, 2000
The PC console driver (PCVT) has two bugs. Display problems can result if reverse video mode is turned on or off twice in a row. This patch also fixes a problem with scrolling region handling that has been seen by many users trying to use the BitchX irc client with the screen program.

A source code patch exists which remedies this problem. This is the second revision of the patch.
015: DRIVER BUG: June 30, 2000
The ste(4) driver supporting Ethernet cards based on the Sundance ST201 chipset (i.e., the D-Link 550TX) has a bug which causes the machine to panic at boot-time.
A source code patch exists which remedies this problem.
016: DRIVER BUG: July 2, 2000
The xl(4) driver supporting various 3com cards, had a bug which prevented the multicast filter from working correctly on the 3c905B, thus preventing many IPv6 things from working.
A source code patch exists which remedies this problem.
017: INSTALLATION FIX: July 3, 2000 All architectures
The screen package shipped with 2.7 does not install itself properly. The existing package in 2.7/packages/_ARCH_/screen-3.9.5.tgz has been renamed to screen-3.9.5.tgz.old and a replacement package has been provided under the name screen-3.9.5p1.tgz.
A source code patch exists which remedies this problem.
018: SECURITY FIX: July 5, 2000 All architectures
Mopd contained a buffer overflow.
A source code patch exists which remedies this problem.
019: SECURITY FIX: July 5, 2000 All architectures
Just like pretty much all the other unix ftp daemons on the planet, ftpd had a remote root hole in it. Luckily, ftpd was not enabled by default. The problem exists if anonymous ftp is enabled.
A source code patch exists which remedies this problem.
020: KERNEL BUG: July 10, 2000
As originally shipped, the pmax port would fail to install due to /kern/msgbuf bugs.
The necessary fixes have been merged, and the binaries needed re-released on the FTP site.
However, the 2.7 srcsys.tar.gz file has not been updated.
If you recompile a kernel, you should use either the stable release source tree or apply the provided patch to a 2.7 source tree.
A source code patch exists which remedies this problem.
021: SECURITY FIX: July 14, 2000 All architectures
Various problems in X11 libraries have various side effects. We provide a jumbo patch to fix them.
- Nasty X Server Dos
  This is fixed by the patch to xc/programs/Xsever/os/secauth.c.
- Various nasty libX11 holes
  This is covered by the patches to xc/lib/X11.
- libICE DoS
  This is covered by the patches to xc/lib/ICE.
- Server overflow
  This is covered by the patches to xc/programs/Xserver/xkb.
  Note that the default OpenBSD install is not vulnerable to this, since the XFree86 Xwrapper already has tests for bad arguments.
A source code patch exists which remedies this problem. Note 1: tcl/tk is required to build X11 from source.
Note 2: When re-building use the command 'make DESTDIR=/ build' or you will get an error in the last step of the build (makewhatis). If you forget to set DESTDIR you can ignore the build error. The whatis database will be rebuilt the next time /etc/weekly runs.
022: INSTALLATION FIX: July 14, 2000
The MacOS installer shipped with OpenBSD 2.7 does not correctly make all devices, specifically it does not make the /dev/arandom device needed for the userland crypto such as ssh to work. The problem shows itself when ssh-keygen fails to make RSA or DSA keys, resulting in messages like RSA-generate_keys failed or DSA-generate_keys failed.
To work around this, once your machine is up and running run the following commands as root:
```
# cd /dev
# ./MAKEDEV arandom
```
After doing this (and possibly installing one of the ssl27 packages), reboot your machine and it will generate ssh keys correctly.
023: SECURITY FIX: Aug 16, 2000 All architectures
A format string vulnerability exists in xlock. As a workaround which disables its functionality, do
```
# chmod u-s /usr/X11R6/bin/xlock
```
A source code patch exists which remedies this problem.
024: SECURITY FIX: Sep 18, 2000 All architectures
Bad ESP/AH packets could cause a crash under certain conditions.
A source code patch exists which remedies this problem.
025: SECURITY FIX: Oct 3, 2000 All architectures
A format string vulnerability exists in the pw_error(3) function. This manifests itself as a security hole in the chpass utility. As a workaround which disables its functionality, do
```
# chmod u-s /usr/bin/chpass
```
A source code patch exists which remedies this problem. For more details, see the OpenBSD advisory.
026: SECURITY FIX: Oct 6, 2000 All architectures
A format string vulnerability exists in talkd(8). It is not clear yet what the impact is.
A source code patch exists which remedies this problem.
027: SECURITY FIX: Oct 6, 2000 All architectures
libcurses honored terminal descriptions in the $HOME/.terminfo directory as well as in the TERMCAP environment variable for setuid and setgid applications.
A source code patch exists which remedies this problem.
028: SECURITY FIX: Oct 6, 2000 All architectures
There are printf-style format string bugs in several privileged programs.
A source code patch exists which remedies this problem.
029: RELIABILITY FIX: Oct 9, 2000 All architectures
There is a non-exploitable buffer overflow in sendmail's test mode.
A source code patch exists which remedies this problem.
030: SECURITY FIX: Oct 10, 2000 All architectures
The telnet daemon does not strip out the TERMINFO, TERMINFO_DIRS, TERMPATH and TERMCAP (when it starts with a '/') environment variables.
A source code patch exists which remedies this problem.
031: SECURITY FIX: Oct 18, 2000 All architectures
Apache has several bugs in mod_rewrite and mod_vhost_alias that could cause arbitrary files accessible to the www user on the server to be exposed under certain configurations when these modules are used. (These modules are not active by default).
A source code patch exists which remedies this problem.
032: SECURITY FIX: Oct 26, 2000 All architectures
There are two possibly exploitable potential buffer overflows in the X11 libraries using the xtrans code. One of these vulnerabilities was reported to the BUGTRAQ mailing list.
A source code patch exists which remedies this problem.
033: RELIABILITY FIX: Nov 6, 2000 All architectures
Invalid fields in the exec header could cause a crash.
A source code patch exists which remedies this problem.
034: RELIABILITY FIX: Nov 10, 2000
When running a sparc with a serial console, certain types of interrupts would cause great grief.
A source code patch exists which remedies this problem.
035: SECURITY FIX: Nov 10, 2000 All architectures
Hostile servers can force OpenSSH clients to do agent or X11 forwarding. This problem is fixed as of OpenSSH 2.3.0.
A source code patch exists which remedies this problem.
036: RELIABILITY FIX: Nov 17, 2000
Configuring a qec+qe causes a NMI panic.
A source code patch exists which remedies this problem.
037: SECURITY FIX: Dec 4, 2000 All architectures
OpenBSD 2.7's ftpd contains a one-byte overflow in the replydirname() function.
A source code patch exists which remedies this problem.
039: SECURITY FIX: Feb 22, 2001 All architectures
There is an exploitable heap corruption bug in sudo.
A source code patch exists which remedies this problem.
040: SECURITY FIX: Mar 18, 2001 All architectures
The readline library shipped with OpenBSD allows history files creation with a permissive umask(2). This can lead to the leakage of sensitive information in applications that use passwords and the like during user interaction (one such application is mysql). Additionally, if the HOME environment variable is not set, the current working directory is used; this patch disables the history file if HOME is not set.
A source code patch exists which remedies this problem.