Antonio Larrosa
da2c6cc517
* No changes for askpass, see main package changelog for
details.
- Fix a dbus connection leaked in the logind patch that was
missing a sd_bus_unref call (found by Matthias Gerstner):
* logind_set_tty.patch
- Add a patch that fixes a small memory leak when parsing the
subsystem configuration option:
* fix-memleak-in-process_server_config_line_depth.patch
- Update to openssh 9.8p1:
= Security
* 1) Race condition in sshd(8) (bsc#1226642, CVE-2024-6387).
A critical vulnerability in sshd(8) was present in Portable
OpenSSH versions between 8.5p1 and 9.7p1 (inclusive) that may
allow arbitrary code execution with root privileges.
Successful exploitation has been demonstrated on 32-bit
Linux/glibc systems with ASLR. Under lab conditions, the attack
requires on average 6-8 hours of continuous connections up to
the maximum the server will accept. Exploitation on 64-bit
systems is believed to be possible but has not been
demonstrated at this time. It's likely that these attacks will
be improved upon.
Exploitation on non-glibc systems is conceivable but has not
been examined. Systems that lack ASLR or users of downstream
Linux distributions that have modified OpenSSH to disable
per-connection ASLR re-randomisation (yes - this is a thing, no
- we don't understand why) may potentially have an easier path
to exploitation. OpenBSD is not vulnerable.
OBS-URL: https://build.opensuse.org/package/show/network/openssh?expand=0&rev=272
39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
From 146c420d29d055cc75c8606327a1cf8439fe3a08 Mon Sep 17 00:00:00 2001
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From: "djm@openbsd.org" <djm@openbsd.org>
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Date: Mon, 1 Jul 2024 04:31:17 +0000
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Subject: [PATCH] upstream: when sending ObscureKeystrokeTiming chaff packets,
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we
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can't rely on channel_did_enqueue to tell that there is data to send. This
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flag indicates that the channels code enqueued a packet on _this_ ppoll()
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iteration, not that data was enqueued in _any_ ppoll() iteration in the
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timeslice. ok markus@
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OpenBSD-Commit-ID: 009b74fd2769b36b5284a0188ade182f00564136
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---
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clientloop.c | 7 ++++---
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1 file changed, 4 insertions(+), 3 deletions(-)
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diff --git a/clientloop.c b/clientloop.c
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index 0b6f3c9be02..8ed8b1c3449 100644
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--- a/clientloop.c
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+++ b/clientloop.c
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#@@ -1,4 +1,4 @@
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#-/* $OpenBSD: clientloop.c,v 1.407 2024/05/17 06:42:04 jsg Exp $ */
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#+/* $OpenBSD: clientloop.c,v 1.408 2024/07/01 04:31:17 djm Exp $ */
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# /*
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# * Author: Tatu Ylonen <ylo@cs.hut.fi>
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# * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@@ -607,8 +607,9 @@ obfuscate_keystroke_timing(struct ssh *ssh, struct timespec *timeout,
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if (timespeccmp(&now, &chaff_until, >=)) {
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/* Stop if there have been no keystrokes for a while */
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stop_reason = "chaff time expired";
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- } else if (timespeccmp(&now, &next_interval, >=)) {
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- /* Otherwise if we were due to send, then send chaff */
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+ } else if (timespeccmp(&now, &next_interval, >=) &&
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+ !ssh_packet_have_data_to_write(ssh)) {
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+ /* If due to send but have no data, then send chaff */
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if (send_chaff(ssh))
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nchaff++;
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}
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