by Kastro
Paper/Archive/CVE-2023-52440

CVE-2023-52440

Linux Linux — ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()

EPSS 22%CVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 97.7.977 × 2019.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob() If authblob->SessionKey.Length is bigger than session key size(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes. cifs_arc4_crypt copy to session key array from SessionKey from client.

Affected

ProductAffectedFixed inSource
Linuxc5049d2d73b2dc8e6bb64be633250bad1ae3d9ef – < bd554ed4fdc3d38404a1c43d428432577573e809bd554ed4fdc3d38404a1c43d428432577573e809CNA
Linuxf9929ef6a2a55f03aac61248c6a3a987b8546f2a – < 30fd6521b2fbd9b767e438e31945e5ea3e3a2fba30fd6521b2fbd9b767e438e31945e5ea3e3a2fbaCNA
Linuxf9929ef6a2a55f03aac61248c6a3a987b8546f2a – < 7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c47f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4CNA
Linuxf9929ef6a2a55f03aac61248c6a3a987b8546f2a – < ecd7e1c562cb08e41957fcd4b0e404de5ab38e20ecd7e1c562cb08e41957fcd4b0e404de5ab38e20CNA
Linuxf9929ef6a2a55f03aac61248c6a3a987b8546f2a – < 4b081ce0d830b684fdf967abc3696d12613872544b081ce0d830b684fdf967abc3696d1261387254CNA
Linux5.17–CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/bd554ed4fdc3d38404a1c43d428432577573e809refgit.kernel.org/stable/c/30fd6521b2fbd9b767e438e31945e5ea3e3a2fbarefgit.kernel.org/stable/c/7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4refgit.kernel.org/stable/c/ecd7e1c562cb08e41957fcd4b0e404de5ab38e20refgit.kernel.org/stable/c/4b081ce0d830b684fdf967abc3696d1261387254