ID CVE-2018-15390
Summary A vulnerability in the FTP inspection engine of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software fails to release spinlocks when a device is running low on system memory, if the software is configured to apply FTP inspection and an access control rule to transit traffic, and the access control rule is associated with an FTP file policy. An attacker could exploit this vulnerability by sending a high rate of transit traffic through an affected device to cause a low-memory condition on the device. A successful exploit could allow the attacker to cause a software panic on the affected device, which could cause the device to reload and result in a temporary DoS condition.
References
Vulnerable Configurations
  • cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:firepower_threat_defense:6.2.3.4:*:*:*:*:*:*:*
CVSS
Base: 7.1 (as of 31-08-2020 - 20:06)
Impact:
Exploitability:
CWE CWE-667
CAPEC
  • Leveraging Race Conditions via Symbolic Links
    This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to her. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file she will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
  • Forced Deadlock
    The adversary triggers and exploits a deadlock condition in the target software to cause a denial of service. A deadlock can occur when two or more competing actions are waiting for each other to finish, and thus neither ever does. Deadlock conditions can be difficult to detect.
  • Leveraging Race Conditions
    The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with his version and cause the system to read the malicious file.
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE COMPLETE
cvss-vector via4 AV:N/AC:M/Au:N/C:N/I:N/A:C
refmap via4
bid 105519
cisco 20181003 Cisco Firepower Threat Defense Software FTP Inspection Denial of Service Vulnerability
Last major update 31-08-2020 - 20:06
Published 05-10-2018 - 14:29
Last modified 31-08-2020 - 20:06
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