CVE-2019-1909
CVSS V2 Medium 4.3
CVSS V3 Medium 5.9
Description
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 on an affected system. 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 set of attributes 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 from explicitly defined peers only. 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.
Overview
- CVE ID
- CVE-2019-1909
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Modified
- Published Version
- 2019-07-06T02:15:11
- Last Modified Date
- 2019-10-09T23:48:31
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 4.3.1 | 6.6.2 |
| cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asr_9920:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-iosxr-bgp-dos | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-1909 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1909 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:02:53 | Added to TrackCVE | |||
| 2022-12-03 22:58:48 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-03 22:58:48 | 2019-07-06T02:15Z | 2019-07-06T02:15:11 | CVE Published Date | updated |
| 2022-12-03 22:58:48 | 2019-10-09T23:48:31 | CVE Modified Date | updated | |
| 2022-12-03 22:58:48 | Modified | Vulnerability Status | updated |