This is the OpenBSD 2.5 release errata & patch list:

All architectures

• SECURITY FIX: Aug 30, 1999
  In cron(8), make sure argv[] is NULL terminated in the fake popen() and run sendmail as the user, not as root. A source code patch exists which remedies this problem.

• SECURITY FIX: Aug 12, 1999
  The procfs and fdescfs filesystems had an overrun in their handling of uio_offset in their readdir() routines. (These filesystems are not enabled by default). A source code patch exists which remedies this problem.

• SECURITY FIX: Aug 9, 1999
  Stop profiling (see profil(2)) when we execve() a new process. A source code patch exists which remedies this problem.

• SECURITY FIX: Aug 6, 1999
  Packets that should have been handled by IPsec may be transmitted as cleartext. PF_KEY SA expirations may leak kernel resources. A source code patch exists which remedies this problem.

• SECURITY FIX: Aug 5, 1999
  In /etc/rc, use mktemp(1) for motd re-writing, and change the find(1) to use -execdir. A source code patch exists which remedies this problem.

• SECURITY FIX: Jul 30, 1999
  Do not permit regular users to chflags(2) or fchflags(2) on character or block devices which they may currently be the owner of. A source code patch exists which remedies this problem.

• SECURITY FIX: Jul 27, 1999
  Cause groff(1) to be invoked with the -S flag, when called by nroff(1), to avoid various groff features which may be security issues. On the whole, this is not really a security issue, but it was discussed on BUGTRAQ as if it is. A source code patch exists which remedies this problem.

• RELIABILITY FIX: May 19, 1999
  Programs using fts(3) could dump core when given a directory structure with a very large number of entries. A source code patch exists which remedies this problem.

• RELIABILITY FIX: May 19, 1999
  Sequence numbers could wrap with TCP_SACK and TCP_NEWRENO, resulting in failure to retransmit correctly. A source code patch exists which remedies this problem.

• RELIABILITY FIX
  Retransmitted TCP packets could get corrupted when flowing over an IPSEC ESP tunnel. A source code patch exists which remedies this problem.

• RELIABILITY FIX
  A local user can crash the system by reading a file larger than 64meg from an ext2fs partition. A source code patch exists which remedies this problem.

• RELIABILITY FIX
  PF_KEY socket operations leak internal kernel resources, so that a system running an IPsec keymanagement daemon like photurisd or isakmpd will cause the networking subsystem to stop working after a finite amount of time. A source code patch exists which remedies this problem.

i386

• No problems identified yet.

mac68k

• INSTALL PROBLEM
  The mac68k install utils were mistakenly left off the CD and out of the FTP install directories. These tools have now been added to the FTP install directories. See ftp://ftp.openbsd.org/pub/OpenBSD/2.5/mac68k/utils

sparc

• No problems identified yet.

amiga

• No problems identified yet.

pmax

• No problems identified yet.

arc

• No problems identified yet.

alpha

• No problems identified yet.

hp300

• No problems identified yet.

mvme68k

• No problems identified yet.

powerpc

• RELIABILITY FIX
  Two problems in the powerpc kernel trap handling cause severe system unreliability. A source code patch exists which remedies these problems.