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Vulnerability Details :

CVE-2023-20233

Summary
Assigner-cisco
Assigner Org ID-d1c1063e-7a18-46af-9102-31f8928bc633
Published At-13 Sep, 2023 | 16:40
Updated At-02 Aug, 2024 | 09:05
Rejected At-
Credits

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:cisco
Assigner Org ID:d1c1063e-7a18-46af-9102-31f8928bc633
Published At:13 Sep, 2023 | 16:40
Updated At:02 Aug, 2024 | 09:05
Rejected At:
▼CVE Numbering Authority (CNA)

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.

Affected Products
Vendor
Cisco Systems, Inc.Cisco
Product
Cisco IOS XR Software
Versions
Affected
  • 5.2.0
  • 5.2.1
  • 5.2.2
  • 5.2.4
  • 5.2.3
  • 5.2.5
  • 5.3.0
  • 5.3.1
  • 5.3.2
  • 5.3.3
  • 5.3.4
  • 6.1.1
  • 6.1.2
  • 6.1.3
  • 6.1.4
  • 6.2.1
  • 6.2.2
  • 6.2.3
  • 6.2.25
  • 6.3.2
  • 6.3.3
  • 6.3.15
  • 6.4.1
  • 6.4.2
  • 6.4.3
  • 6.5.1
  • 6.5.2
  • 6.6.2
  • 6.6.3
  • 6.6.25
  • 6.6.4
  • 7.0.1
  • 7.0.2
  • 7.1.1
  • 7.1.15
  • 7.1.2
  • 7.1.3
  • 6.7.1
  • 6.7.2
  • 6.7.3
  • 6.7.4
  • 7.2.1
  • 7.2.2
  • 7.3.1
  • 7.3.2
  • 7.3.3
  • 7.4.1
  • 7.4.2
  • 6.8.1
  • 6.8.2
  • 7.5.1
  • 7.5.3
  • 7.5.2
  • 7.6.1
  • 7.6.2
  • 7.7.1
  • 7.7.2
  • 6.9.1
  • 6.9.2
Problem Types
TypeCWE IDDescription
cweCWE-476NULL Pointer Dereference
Type: cwe
CWE ID: CWE-476
Description: NULL Pointer Dereference
Metrics
VersionBase scoreBase severityVector
3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt
N/A
Hyperlink: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt
Resource: N/A
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt
x_transferred
Hyperlink: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt
Resource:
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:ykramarz@cisco.com
Published At:13 Sep, 2023 | 17:15
Updated At:25 Jan, 2024 | 17:15

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Secondary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Type: Primary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CPE Matches
Cisco Systems, Inc.
cisco
>>ios_xr>>Versions before 7.5.4(exclusive)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Cisco Systems, Inc.
cisco
>>ios_xr>>Versions from 7.6(inclusive) to 7.6.3(exclusive)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Cisco Systems, Inc.
cisco
>>ios_xr>>Versions from 7.7(inclusive) to 7.7.21(exclusive)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Cisco Systems, Inc.
cisco
>>ios_xr>>Versions from 7.8(inclusive) to 7.8.2(exclusive)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Cisco Systems, Inc.
cisco
>>ios_xr>>7.9.0
cpe:2.3:o:cisco:ios_xr:7.9.0:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-354Primarynvd@nist.gov
CWE-476Secondaryykramarz@cisco.com
CWE ID: CWE-354
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-476
Type: Secondary
Source: ykramarz@cisco.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKtykramarz@cisco.com
Vendor Advisory
Hyperlink: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt
Source: ykramarz@cisco.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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