diff mbox series

[scarthgap,03/21] openssh: fix CVE-2024-6387

Message ID 39537bf4f9c0e25c63e984da367e6915da986ff5.1720095886.git.steve@sakoman.com
State RFC
Delegated to: Steve Sakoman
Headers show
Series [scarthgap,01/21] llvm: Fix CVE-2024-0151 | expand

Commit Message

Steve Sakoman July 4, 2024, 12:26 p.m. UTC 
From: Jose Quaresma <quaresma.jose@gmail.com>

sshd(8) in Portable OpenSSH versions 8.5p1 to 9.7p1 (inclusive).
Race condition resulting in potential remote code execution.
A race condition in sshd(8) could allow remote code execution as root on non-OpenBSD systems.
This attack could be prevented by disabling the login grace timeout (LoginGraceTime=0 in sshd_config)
though this makes denial-of service against sshd(8) considerably easier.
For more information, please refer to the release notes [1] and the
report from the Qualys Security Advisory Team [2] who discovered the bug.

[1] https://www.openssh.com/txt/release-9.8
[2] https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.txt

References:
https://www.openssh.com/security.html

Signed-off-by: Jose Quaresma <jose.quaresma@foundries.io>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
---
 .../openssh/openssh/CVE-2024-6387.patch       | 27 +++++++++++++++++++
 .../openssh/openssh_9.6p1.bb                  |  1 +
 2 files changed, 28 insertions(+)
 create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.patch
diff mbox series

Patch

diff --git a/meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.patch b/meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.patch
new file mode 100644
index 0000000000..3e7c707100
--- /dev/null
+++ b/meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.patch
@@ -0,0 +1,27 @@ 
+Description: fix signal handler race condition
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2070497
+
+CVE: CVE-2024-6387
+
+Upstream-Status: Backport
+https://git.launchpad.net/ubuntu/+source/openssh/commit/?h=applied/ubuntu/jammy-devel&id=b059bcfa928df4ff2d103ae2e8f4e3136ee03efc
+
+Signed-off-by: Jose Quaresma <jose.quaresma@foundries.io>
+
+--- a/log.c
++++ b/log.c
+@@ -452,12 +452,14 @@ void
+ sshsigdie(const char *file, const char *func, int line, int showfunc,
+     LogLevel level, const char *suffix, const char *fmt, ...)
+ {
++#if 0
+ 	va_list args;
+ 
+ 	va_start(args, fmt);
+ 	sshlogv(file, func, line, showfunc, SYSLOG_LEVEL_FATAL,
+ 	    suffix, fmt, args);
+ 	va_end(args);
++#endif
+ 	_exit(1);
+ }
+ 
diff --git a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
index d941664b41..3cdf0327b0 100644
--- a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
+++ b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
@@ -27,6 +27,7 @@  SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar
            file://add-test-support-for-busybox.patch \
            file://0001-regress-banner.sh-log-input-and-output-files-on-erro.patch \
            file://0001-systemd-Add-optional-support-for-systemd-sd_notify.patch \
+           file://CVE-2024-6387.patch \
            "
 SRC_URI[sha256sum] = "910211c07255a8c5ad654391b40ee59800710dd8119dd5362de09385aa7a777c"