Samba fixes 1 vulnerability

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[TLP:CLEAR] Samba fixes 1 vulnerability

Samba version 4.21.6 fixes 1 vulnerability [1][2]. Among operating systems, only Debian has so far provided a fix, for the bullseye release in version 2:4.13.13+dfsg-1~deb11u6 and bookworm in version 2:4.17.12+dfsg-0+deb12u1 [3].

Samba - improper authentication (CVE-2025-0620)

CVSS 7.0 (High)

An authenticated remote attacker can, due to faulty cache management in Samba, continue to use the access rights of a former Active Directory group membership, because changes do not take effect after Kerberos re-authentication without fully disconnecting and reconnecting to the server [1][2].

The vulnerability is present in product:

Samba; >=4.21.0, <4.21.6

CVSS: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/S:N/AU:N/R:I/V:C/RE:L

More information:

CVE-2025-0620 at cve.org, NVD
CWE-287: Improper Authentication at cwe.mitre.org

The vulnerability was publicly disclosed 4. 6. 2025.

Links

By CESNET, z.s.p.o. Michaela Jarošová on 4. 6. 2025.

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[TLP:CLEAR] Samba fixes 1 vulnerability

Samba - improper authentication (CVE-2025-0620)

CVSS 7.0 (High)

Links