Vulnerability Name:

CVE-2018-15428 (CCN-150783)

Assigned:2018-10-03
Published:2018-10-03
Updated:2019-10-09
Summary:A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain BGP update messages. An attacker could exploit this vulnerability by sending BGP update messages that include a specific, malformed attribute to be processed by an affected system. A successful exploit could allow the attacker to cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.
CVSS v3 Severity:6.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H)
5.9 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-20
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-15428

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1041790

Source: XF
Type: UNKNOWN
cisco-cve201815428-dos(150783)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20181003-iosxr-dos
Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

Source: CISCO
Type: Vendor Advisory
20181003 Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xr:6.0.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.0.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.1.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.1.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.1.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.1.4:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.2.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.2.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.2.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xr:6.4.1:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:asr_9001:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9006:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9010:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9901:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9904:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9906:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9910:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9912:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_9922:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:ios_xr_software:4.0.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xr 6.0.1
    cisco ios xr 6.0.2
    cisco ios xr 6.1.1
    cisco ios xr 6.1.2
    cisco ios xr 6.1.3
    cisco ios xr 6.1.4
    cisco ios xr 6.2.1
    cisco ios xr 6.2.2
    cisco ios xr 6.2.3
    cisco ios xr 6.4.1
    cisco asr 9001 -
    cisco asr 9006 -
    cisco asr 9010 -
    cisco asr 9901 -
    cisco asr 9904 -
    cisco asr 9906 -
    cisco asr 9910 -
    cisco asr 9912 -
    cisco asr 9922 -
    cisco ios xr software 4.0.1