4d3fc8b057
This release fixes a number of security bugs and has minor new features and bug fixes. Security fixes, from the release notes (https://www.openssh.com/txt/release-9.3): This release contains fixes for a security problem and a memory safety problem. The memory safety problem is not believed to be exploitable, but we report most network-reachable memory faults as security bugs. * ssh-add(1): when adding smartcard keys to ssh-agent(1) with the per-hop destination constraints (ssh-add -h ...) added in OpenSSH 8.9, a logic error prevented the constraints from being communicated to the agent. This resulted in the keys being added without constraints. The common cases of non-smartcard keys and keys without destination constraints are unaffected. This problem was reported by Luci Stanescu. * ssh(1): Portable OpenSSH provides an implementation of the getrrsetbyname(3) function if the standard library does not provide it, for use by the VerifyHostKeyDNS feature. A specifically crafted DNS response could cause this function to perform an out-of-bounds read of adjacent stack data, but this condition does not appear to be exploitable beyond denial-of- service to the ssh(1) client. The getrrsetbyname(3) replacement is only included if the system's standard library lacks this function and portable OpenSSH was not compiled with the ldns library (--with-ldns). getrrsetbyname(3) is only invoked if using VerifyHostKeyDNS to fetch SSHFP records. This problem was found by the Coverity static analyzer. Sponsored by: The FreeBSD Foundation
66 lines
2.5 KiB
C
66 lines
2.5 KiB
C
/* $OpenBSD: compat.h,v 1.62 2023/03/06 12:14:48 dtucker Exp $ */
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/*
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* Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef COMPAT_H
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#define COMPAT_H
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#define SSH_BUG_UTF8TTYMODE 0x00000001
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#define SSH_BUG_SIGTYPE 0x00000002
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#define SSH_BUG_SIGTYPE74 0x00000004
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/* #define unused 0x00000008 */
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#define SSH_OLD_SESSIONID 0x00000010
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/* #define unused 0x00000020 */
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#define SSH_BUG_DEBUG 0x00000040
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/* #define unused 0x00000080 */
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/* #define unused 0x00000100 */
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/* #define unused 0x00000200 */
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/* #define unused 0x00000400 */
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#define SSH_BUG_SCANNER 0x00000800
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/* #define unused 0x00001000 */
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/* #define unused 0x00002000 */
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#define SSH_OLD_DHGEX 0x00004000
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#define SSH_BUG_NOREKEY 0x00008000
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/* #define unused 0x00010000 */
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/* #define unused 0x00020000 */
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/* #define unused 0x00040000 */
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/* #define unused 0x00100000 */
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#define SSH_BUG_EXTEOF 0x00200000
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#define SSH_BUG_PROBE 0x00400000
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/* #define unused 0x00800000 */
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#define SSH_OLD_FORWARD_ADDR 0x01000000
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/* #define unused 0x02000000 */
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#define SSH_NEW_OPENSSH 0x04000000
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#define SSH_BUG_DYNAMIC_RPORT 0x08000000
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#define SSH_BUG_CURVE25519PAD 0x10000000
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#define SSH_BUG_HOSTKEYS 0x20000000
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#define SSH_BUG_DHGEX_LARGE 0x40000000
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struct ssh;
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void compat_banner(struct ssh *, const char *);
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char *compat_kex_proposal(struct ssh *, const char *);
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#endif
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