| Vulnerability Name: | CVE-2019-12647 (CCN-167617) |
| Assigned: | 2019-09-25 |
| Published: | 2019-09-25 |
| Updated: | 2019-10-09 |
| Summary: | A vulnerability in the Ident protocol handler of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability exists because the affected software incorrectly handles memory structures, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by opening a TCP connection to specific ports and sending traffic over that connection. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.
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| CVSS v3 Severity: | 7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/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): None
Availibility (A): High |
8.6 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/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): Low
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: | 7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)| Exploitability Metrics: | Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None | | Impact Metrics: | Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete |
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)| Exploitability Metrics: | Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
| | Impact Metrics: | Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete |
|
| Vulnerability Type: | CWE-476
|
| Vulnerability Consequences: | Denial of Service |
| References: | Source: MITRE
Type: CNA
CVE-2019-12647
Source: XF
Type: UNKNOWN
cisco-cve201912647-dos(167617)
Source: CCN
Type: Cisco Security Advisory cisco-sa-20190925-identd-dos
Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability
Source: CISCO
Type: Vendor Advisory
20190925 Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability
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| Vulnerable Configuration: | Configuration 1:
cpe:/o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*OR cpe:/o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*AND cpe:/h:cisco:1100:-:*:*:*:*:*:*:*OR cpe:/h:cisco:4221:-:*:*:*:*:*:*:*OR cpe:/h:cisco:4321:-:*:*:*:*:*:*:*OR cpe:/h:cisco:4351:-:*:*:*:*:*:*:*OR cpe:/h:cisco:4431:-:*:*:*:*:*:*:*OR cpe:/h:cisco:4451-x:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_1000:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_1001-hx:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_1001-x:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_1002-hx:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_1002-x:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr_900:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-10sz-pd:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-12cz-a:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-12cz-d:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-12sz-im:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-24sz-im:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-24sz-m:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-24tz-m:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-4sz-a:-:*:*:*:*:*:*:*OR cpe:/h:cisco:asr-920-4sz-d:-:*:*:*:*:*:*:*OR cpe:/h:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:*OR cpe:/h:cisco:ncs_4201:-:*:*:*:*:*:*:*OR cpe:/h:cisco:ncs_4202:-:*:*:*:*:*:*:*OR cpe:/h:cisco:ncs_4206:-:*:*:*:*:*:*:*OR cpe:/h:cisco:ncs_4216:-:*:*:*:*:*:*:*OR cpe:/h:cisco:network_convergence_system_520:-:*:*:*:*:*:*:*
Configuration CCN 1:
cpe:/o:cisco:ios_software:*:*:*:*:*:*:*:*OR cpe:/o:cisco:ios_xe_software:*:*:*:*:*:*:*:*
 Denotes that component is vulnerable |
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