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All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.

🗓️ 15 Oct 2024 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

Samba pre-4.15.5 allows probing outside share via server symlinks with SMB1 Unix extensions.

Related
Detection
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IBM Security Bulletins		Security Bulletin: IBM i is vulnerable to bypass security restrictions due to Samba SMB1 (CVE-2021-43566 and CVE-2021-44141)
2 Mar 202214:24
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FreeBSD		samba -- Multiple Vulnerabilities
31 Jan 202200:00
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Tenable Nessus		Amazon Linux 2022 : ctdb, ctdb-pcp-pmda, libsmbclient (ALAS2022-2022-022)
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Tenable Nessus		Alibaba Cloud Linux 3 : 0176: samba (ALINUX3-SA-2022:0176)
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Tenable Nessus		AlmaLinux 8 : samba (ALSA-2022:2074)
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Tenable Nessus		Azure Linux 3.0 Security Update: samba (CVE-2021-44141)
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Tenable Nessus		CentOS 8 : samba (CESA-2022:2074)
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Vulners
Node
microsoftazl3_samba_4.18.3-1Range<4.18.3-1

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15 Oct 2024 07:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 23.5
CVSS 3.14.3
EPSS0.00308
sambaserver symlinksunix extensionsversion 4.15.5
1