Vulnerability Name:

CVE-2018-0138 (CCN-138777)

Assigned:2017-11-27
Published:2018-02-07
Updated:2019-10-09
Summary:A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass file policies that are configured to block files transmitted to an affected device via the BitTorrent protocol. The vulnerability exists because the affected software does not detect BitTorrent handshake messages correctly. An attacker could exploit this vulnerability by sending a crafted BitTorrent connection request to an affected device. A successful exploit could allow the attacker to bypass file policies that are configured to block files transmitted to the affected device via the BitTorrent protocol. Cisco Bug IDs: CSCve26946.
CVSS v3 Severity:5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
5.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-693
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2018-0138

Source: BID
Type: Third Party Advisory, VDB Entry
102978

Source: CCN
Type: BID-102978
Cisco Firepower System Software CVE-2018-0138 Remote Security Bypass Vulnerability

Source: XF
Type: UNKNOWN
cisco-fss-cve20180138-sec-bypass(138777)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20180207-fss
Cisco Firepower System Software BitTorrent File Policy Bypass Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-fss

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:firepower_threat_defense:6.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:6.2.0:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:6.2.2:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:firepower_threat_defense:6.2.3:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:cisco:firepower_system_software:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco firepower threat defense 6.1.0
    cisco firepower threat defense 6.2.0
    cisco firepower threat defense 6.2.2
    cisco firepower threat defense 6.2.3
    cisco firepower system software -