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.quare...@foundries.io> --- v2: include the missing cve tag: CVE: CVE-2024-6387 .../openssh/openssh/CVE-2024-6387.patch | 25 +++++++++++++++++++ .../openssh/openssh_8.9p1.bb | 1 + 2 files changed, 26 insertions(+) create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.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..9f8f6881e7 --- /dev/null +++ b/meta/recipes-connectivity/openssh/openssh/CVE-2024-6387.patch @@ -0,0 +1,25 @@ +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 + +--- 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_8.9p1.bb b/meta/recipes-connectivity/openssh/openssh_8.9p1.bb index 6411a64eff..d2c477a062 100644 --- a/meta/recipes-connectivity/openssh/openssh_8.9p1.bb +++ b/meta/recipes-connectivity/openssh/openssh_8.9p1.bb @@ -36,6 +36,7 @@ SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar file://CVE-2023-48795.patch \ file://CVE-2023-51384.patch \ file://CVE-2023-51385.patch \ + file://CVE-2024-6387.patch \ " SRC_URI[sha256sum] = "fd497654b7ab1686dac672fb83dfb4ba4096e8b5ffcdaccd262380ae58bec5e7" -- 2.45.2
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