OpenBSD 3.1 Errata

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: 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.

• 002: 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.

• 003: 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.

• 004: SECURITY FIX: May 22, 2002   All architectures
  Under certain conditions, on systems using YP with netgroups in the password database, it is possible that sshd(8) does ACL checks for the requested user name but uses the password database entry of a different user for authentication. This means that denied users might authenticate successfully while permitted users could be locked out.
  A source code patch exists which remedies this problem.

• 005: SECURITY FIX: June 19, 2002   All architectures
  A buffer overflow can occur during the interpretation of chunked encoding in the http daemon, leading to possible remote crash or exploit.
  A source code patch exists which remedies this problem.

• 006: SECURITY FIX: June 24, 2002   All architectures
  All versions of OpenSSH's sshd between 2.3.1 and 3.3 contain an input validation error that can result in an integer overflow and privilege escalation. This problem is fixed in OpenSSH 3.4, and a patch for the vulnerable releases is available as part of the security advisory.

• 007: 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.

• 008: SECURITY FIX: June 26, 2002   All architectures
  A buffer overflow can occur in the .htaccess parsing code in mod_ssl httpd module, leading to possible remote crash or exploit.
  A source code patch exists which remedies this problem.

• 009: SECURITY FIX: June 27, 2002   All architectures
  The kernel would let any user ktrace(2) set[ug]id processes.
  A source code patch exists which remedies this problem.

• 010: RELIABILITY FIX: July 5, 2002   All architectures
  Receiving IKE payloads out of sequence can cause isakmpd(8) to crash.
  A source code patch exists which remedies this problem.
  This is the second version of the patch.

• 011: SECURITY FIX: July 29, 2002   All architectures
  A race condition exists in the pppd(8) daemon which may cause it to alter the file permissions of an arbitrary file.
  A source code patch exists which remedies this problem.

• 012: SECURITY FIX: July 29, 2002   All architectures
  A buffer overflow can occur in the xdr_array(3) RPC code, leading to possible remote crash.
  A source code patch exists which remedies this problem.
  This is the second version of the patch.

• 013: SECURITY FIX: July 30, 2002   All architectures
  Several remote buffer overflows can occur in the SSL2 server and SSL3 client of the ssl(8) library, as in the ASN.1 parser code in the crypto(3) library, all of them being potentially remotely exploitable.
  A source code patch exists which remedies this problem.
  This is the second version of the patch.

• 014: SECURITY FIX: August 11, 2002   All architectures
  An insufficient boundary check in the select(2) system call allows an attacker to overwrite kernel memory and execute arbitrary code in kernel context.
  A source code patch exists which remedies this problem. For more details, see the OpenBSD advisory.

• 015: SECURITY FIX: October 2, 2002   All architectures
  Incorrect argument checking in the setitimer(2) system call may allow an attacker to write to kernel memory.
  A source code patch exists which remedies this problem.

• 016: SECURITY FIX: October 21, 2002   All architectures
  A buffer overflow can occur in the kadmind(8) daemon, leading to possible remote crash or exploit.
  A source code patch exists which remedies this problem.

• 017: SECURITY FIX: November 6, 2002   All architectures
  An attacker can bypass the restrictions imposed by sendmail's restricted shell, smrsh(8), and execute arbitrary commands with the privileges of his own account.
  A source code patch exists which remedies this problem.

• 018: SECURITY FIX: November 6, 2002   All architectures
  Incorrect argument checking in the getrlimit(2) system call may allow an attacker to crash the kernel.
  A source code patch exists which remedies this problem.

• 019: SECURITY FIX: November 14, 2002   All architectures
  A buffer overflow in named(8) could allow an attacker to execute code with the privileges of named. On OpenBSD, named runs as a non-root user in a chrooted environment which mitigates the effects of this bug.
  A source code patch exists which remedies this problem.

• 020: SECURITY FIX: January 20, 2003   All architectures
  A double free in cvs(1) could allow an attacker to execute code with the privileges of the user running cvs. This is only an issue when the cvs command is being run on a user's behalf as a different user. This means that, in most cases, the issue only exists for cvs configurations that use the pserver client/server connection method.
  A source code patch exists which remedies this problem.

• 021: SECURITY FIX: February 23, 2003   All architectures
  In ssl(8) an information leak can occur via timing by performing a MAC computation even if incorrect block cipher padding has been found, this is a countermeasure. Also, check for negative sizes in memory allocation routines.
  A source code patch exists which fixes these two issues.

• 022: SECURITY FIX: March 3, 2003   All architectures
  A buffer overflow in the envelope comments processing in sendmail(8) may allow an attacker to gain root privileges.
  A source code patch exists which remedies this problem.

• 023: SECURITY FIX: March 5, 2003   All architectures
  A fix for an lprm(1) bug made in 1996 contains an error that could lead to privilege escalation.
  A source code patch exists which remedies this problem.

• 024: SECURITY FIX: March 18, 2003   All architectures
  Various SSL and TLS operations in OpenSSL are vulnerable to timing attacks.
  A source code patch exists which remedies this problem.

• 025: SECURITY FIX: March 19, 2003   All architectures
  OpenSSL is vulnerable to an extension of the "Bleichenbacher" attack designed by Czech researchers Klima, Pokorny and Rosa.
  A source code patch exists which remedies this problem.

• 026: SECURITY FIX: March 24, 2003   All architectures
  The cryptographic weaknesses in the Kerberos v4 protocol can be exploited on Kerberos v5 as well.
  A source code patch exists which remedies this problem.

• 027: SECURITY FIX: March 31, 2003   All architectures
  A buffer overflow in the address parsing in sendmail(8) may allow an attacker to gain root privileges.
  A source code patch exists which remedies this problem.