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CVE-2023-52442— ksmbd: validate session id and tree id in compound request

Quick assessment

Affected
Linux Linux
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 ksmbd 始终返回复合请求中的第一个请求 smb2 标头。

CVSS 9.1 · Critical EPSS 29.64% · P98

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf< 017d85c94f02090a87f4a473dbe0d6ee0da72693 affected
0626e6641f6b467447c81dd7678a69c66f7746cf< becb5191d1d5fdfca0198a2e37457bbbf4fe266f affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 4c2b350b2e269e3fd17bbfa42de1b42775b777ac affected
0626e6641f6b467447c81dd7678a69c66f7746cf< 3df0411e132ee74a87aa13142dfd2b190275332e affected
5.15 affected
< 5.15 unaffected
5.15.145≤ 5.15.* unaffected
6.1.53≤ 6.1.* unaffected
… +2 more rows
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I. Basic Information for CVE-2023-52442

Vulnerability Information
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Vulnerability Title
ksmbd: validate session id and tree id in compound request
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 ksmbd 始终返回复合请求中的第一个请求 smb2 标头。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf ~ 017d85c94f02090a87f4a473dbe0d6ee0da72693 -
Linux Linux 5.15 -

II. Public POCs for CVE-2023-52442

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III. Intelligence Information for CVE-2023-52442

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Mailing List Discussions for CVE-2023-52442 (1)

Other References for CVE-2023-52442 (4)

Same Patch Batch · Linux · 2024-02-21 · 7 CVEs total

CVE-2024-26585 9.8 CRITICAL tls: fix race between tx work scheduling and socket close
CVE-2024-26583 9.8 CRITICAL tls: fix race between async notify and socket close
CVE-2024-26584 9.8 CRITICAL net: tls: handle backlogging of crypto requests
CVE-2024-26582 9.8 CRITICAL net: tls: fix use-after-free with partial reads and async decrypt
CVE-2023-52440 9.8 CRITICAL ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()
CVE-2023-52441 9.1 CRITICAL ksmbd: fix out of bounds in init_smb2_rsp_hdr()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52442

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