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cloudfoundryCloud FoundryCFOUNDRY:638AD36AE48F762313BDCCCB7949875D
HistoryJun 11, 2021 - 12:00 a.m.

USN-4969-1: DHCP vulnerability | Cloud Foundry

2021-06-1100:00:00
Cloud Foundry
www.cloudfoundry.org
12
dhcp
canonical ubuntu
cloud foundry
cve-2021-25217
bionic stemcells
cflinuxfs3
cf deployment
denial of service
mitigation
upgrade
vulnerability report

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS

0.003

Percentile

68.3%

JSON

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 18.04

Description

Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to cause DHCP to crash, resulting in a denial of service.

CVEs contained in this USN include: CVE-2021-25217.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

  • Bionic Stemcells
    • 1.x versions prior to 1.10
    • All other stemcells not listed.
  • cflinuxfs3
    • All versions prior to 0.241.0
  • CF Deployment
    • All versions prior to 16.15.0

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

  • Bionic Stemcells
    • Upgrade 1.x versions to 1.10 or greater
    • All other stemcells should be upgraded to the latest version available on bosh.io.
  • cflinuxfs3
    • Upgrade all versions to 0.241.0 or greater
  • CF Deployment
    • Upgrade all versions to 16.15.0 or greater

References

History

2021-06-11: Initial vulnerability report published.

Affected configurations

Vulners
Node
cloudfoundrybionic_stemcellsRange<1.10
OR
cloudfoundrycflinuxfs3Range<0.241.0
OR
cloudfoundrycf-deploymentRange<16.15.0
VendorProductVersionCPE
cloudfoundrybionic_stemcells*cpe:2.3:a:cloudfoundry:bionic_stemcells:*:*:*:*:*:*:*:*
cloudfoundrycflinuxfs3*cpe:2.3:a:cloudfoundry:cflinuxfs3:*:*:*:*:*:*:*:*
cloudfoundrycf-deployment*cpe:2.3:a:cloudfoundry:cf-deployment:*:*:*:*:*:*:*:*

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veracode
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CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS

0.003

Percentile

68.3%

JSON
Related for CFOUNDRY:638AD36AE48F762313BDCCCB7949875D
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