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Changqing Li
e73af91ee3
CVE-2025-6019: A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_active" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allow_active" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system. Refer: https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt Signed-off-by: Changqing Li <changqing.li@windriver.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
From d92467589216059aff46f545a7c3eba594103ee3 Mon Sep 17 00:00:00 2001
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From: Thomas Blume <Thomas.Blume@suse.com>
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Date: Fri, 16 May 2025 14:27:10 +0200
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Subject: [PATCH] Don't allow suid and dev set on fs resize
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Fixes: CVE-2025-6019
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CVE: CVE-2025-6019
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Upstream-Status: Backport [ https://github.com/storaged-project/libblockdev/commit/46b54414f66e965e3c37f8f51e621f96258ae22e ]
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Signed-off-by: Changqing Li <changqing.li@windriver.com>
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---
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src/plugins/fs/generic.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/plugins/fs/generic.c b/src/plugins/fs/generic.c
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index eb6b5567..86051391 100644
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--- a/src/plugins/fs/generic.c
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+++ b/src/plugins/fs/generic.c
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@@ -409,7 +409,7 @@ static gboolean xfs_resize_device (const gchar *device, guint64 new_size, const
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"before resizing it.", device);
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return FALSE;
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}
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- ret = bd_fs_mount (device, mountpoint, "xfs", NULL, NULL, error);
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+ ret = bd_fs_mount (device, mountpoint, "xfs", "nosuid,nodev", NULL, error);
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if (!ret) {
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g_prefix_error (error, "Failed to mount '%s' before resizing it: ", device);
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return FALSE;
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--
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2.34.1
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