CVE-2024-53179: smb: client: fix use-after-free of signing key
First published: Fri Dec 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free of signing key Customers have reported use-after-free in @ses->auth_key.response with SMB2.1 + sign mounts which occurs due to following race: task A task B cifs_mount() dfs_mount_share() get_session() cifs_mount_get_session() cifs_send_recv() cifs_get_smb_ses() compound_send_recv() cifs_setup_session() smb2_setup_request() kfree_sensitive() smb2_calc_signature() crypto_shash_setkey() *UAF* Fix this by ensuring that we have a valid @ses->auth_key.response by checking whether @ses->ses_status is SES_GOOD or SES_EXITING with @ses->ses_lock held. After commit 24a9799aa8ef ("smb: client: fix UAF in smb2_reconnect_server()"), we made sure to call ->logoff() only when @ses was known to be good (e.g. valid ->auth_key.response), so it's safe to access signing key when @ses->ses_status == SES_EXITING.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.6.70 | |
| Linux Kernel | >=6.7<6.12.2 | |
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.135-1 | 6.12.25-1 6.12.27-1 |
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Reference Links
- https://git.kernel.org/stable/c/39619c65ab4bbb3e78c818f537687653e112764d
- https://git.kernel.org/stable/c/0e2b654a3848bf9da3b0d54c1ccf3f1b8c635591
- https://git.kernel.org/stable/c/343d7fe6df9e247671440a932b6a73af4fa86d95
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53179
- https://nvd.nist.gov/vuln/detail/CVE-2024-53179
- https://launchpad.net/bugs/cve/CVE-2024-53179
- https://security-tracker.debian.org/tracker/CVE-2024-53179
- https://ubuntu.com/security/CVE-2024-53179
- https://git.kernel.org/linus/343d7fe6df9e247671440a932b6a73af4fa86d95
Frequently Asked Questions
What is the severity of CVE-2024-53179?
CVE-2024-53179 has been reported as a medium-severity vulnerability affecting the Linux kernel.
How do I fix CVE-2024-53179?
To remediate CVE-2024-53179, update your Linux kernel to version 6.12.19-1, 6.12.20-1, or any version above 6.7 and less than 6.6.70.
What platforms are impacted by CVE-2024-53179?
CVE-2024-53179 affects the Linux kernel running versions between 5.10.223-1 and up to but not including 6.6.70.
What types of attacks can CVE-2024-53179 facilitate?
CVE-2024-53179 can potentially allow unauthorized access or manipulation of SMB2.1 traffic due to a use-after-free vulnerability.
Is there a recommended action for users of Debian concerning CVE-2024-53179?
Users of Debian should upgrade to the latest kernel versions provided, specifically versions 6.12.19-1 or 6.12.20-1, to mitigate CVE-2024-53179.
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