// For flags

CVE-2017-9461

samba: fd_open_atomic infinite loop due to wrong handling of dangling symlinks

Severity Score

6.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerability (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.

smbd en Samba versiones anteriores a 4.4.10 y 4.5.x versiones anteriores a 4.5.6, tienen una vulnerabilidad de denegación de servicio (fd_open_atomic infinite loop con un alto uso de CPU y consumo de memoria) debido a un manejo inadecuado de los enlaces simbólicos colgantes.

A flaw was found in the way Samba handled dangling symlinks. An authenticated malicious Samba client could use this flaw to cause the smbd daemon to enter an infinite loop and use an excessive amount of CPU and memory.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-06-06 CVE Reserved
  • 2017-06-06 CVE Published
  • 2024-07-29 EPSS Updated
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Samba
Search vendor "Samba"
Samba
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<= 4.4.9
Search vendor "Samba" for product "Samba" and version " <= 4.4.9"
-
Affected
Samba
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Samba
Search vendor "Samba" for product "Samba"
4.5.0
Search vendor "Samba" for product "Samba" and version "4.5.0"
-
Affected
Samba
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Samba
Search vendor "Samba" for product "Samba"
4.5.1
Search vendor "Samba" for product "Samba" and version "4.5.1"
-
Affected
Samba
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Samba
Search vendor "Samba" for product "Samba"
4.5.2
Search vendor "Samba" for product "Samba" and version "4.5.2"
-
Affected
Samba
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Samba
Search vendor "Samba" for product "Samba"
4.5.3
Search vendor "Samba" for product "Samba" and version "4.5.3"
-
Affected
Samba
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Samba
Search vendor "Samba" for product "Samba"
4.5.4
Search vendor "Samba" for product "Samba" and version "4.5.4"
-
Affected
Samba
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Samba
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4.5.5
Search vendor "Samba" for product "Samba" and version "4.5.5"
-
Affected
Redhat
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Enterprise Linux Desktop
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7.0
Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"
-
Affected
Redhat
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Enterprise Linux Server
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7.0
Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.4
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.4"
-
Affected
Redhat
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Enterprise Linux Server Aus
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7.6
Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6"
-
Affected
Redhat
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Enterprise Linux Server Eus
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7.4
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-
Affected
Redhat
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Enterprise Linux Server Eus
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7.5
Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.5"
-
Affected
Redhat
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Enterprise Linux Server Eus
Search vendor "Redhat" for product "Enterprise Linux Server Eus"
7.6
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-
Affected
Redhat
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Enterprise Linux Server Tus
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7.6
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-
Affected
Redhat
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Enterprise Linux Workstation
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7.0
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-
Affected
Debian
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Debian Linux
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8.0
Search vendor "Debian" for product "Debian Linux" and version "8.0"
-
Affected