CVE-2020-14556

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2020-14556
Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Libraries). Supported versions that are affected are Java SE: 8u251, 11.0.7 and 14.0.1; Java SE Embedded: 8u251. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Java SE, Java SE Embedded accessible data as well as unauthorized read access to a subset of Java SE, Java SE Embedded accessible data. Note: Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

5.8 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References
Link Resource
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00019.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00019.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00027.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00027.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00041.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00041.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00021.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00021.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/ Third Party Advisory
https://security.gentoo.org/glsa/202008-24 Third Party Advisory
https://security.gentoo.org/glsa/202008-24 Third Party Advisory
https://security.gentoo.org/glsa/202209-15 Third Party Advisory
https://security.gentoo.org/glsa/202209-15 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200717-0005/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20200717-0005/ Third Party Advisory
https://usn.ubuntu.com/4433-1/ Third Party Advisory
https://usn.ubuntu.com/4433-1/ Third Party Advisory
https://usn.ubuntu.com/4453-1/ Third Party Advisory
https://usn.ubuntu.com/4453-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4734 Third Party Advisory
https://www.debian.org/security/2020/dsa-4734 Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.html Patch Vendor Advisory
https://www.oracle.com/security-alerts/cpujul2020.html Patch Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:oracle:openjdk:13.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:-:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update102:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update112:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update152:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update162:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update172:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update192:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update20:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update202:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update212:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update101:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update111:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update121:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update131:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update222:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update232:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update241:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone1:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone2:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone3:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone4:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update11:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update141:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update151:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update161:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update171:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update181:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update191:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update201:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update211:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update221:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update231:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update25:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:14:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone5:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone6:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone7:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone8:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone9:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update242:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update252:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.6:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13.0.3:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:oracle:jdk:11.0.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:14.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jdk:1.8.0:update251:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:1.8.0:update251:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:11.0.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:14.0.1:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

Configuration 5 (hide)

OR cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 6 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

Configuration 7 (hide)

OR cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:sap:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:storagegrid:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vsphere:*:*
cpe:2.3:a:netapp:snapmanager:-:-:*:*:*:oracle:*:*
cpe:2.3:a:netapp:santricity_unified_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_performance_analyzer:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_web_services:-:*:*:*:*:web_services_proxy:*:*
cpe:2.3:a:netapp:7-mode_transition_tool:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_secure_agent:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
History

27 May 2025, 16:35

Type Values Removed Values Added
References (GENTOO) https://security.gentoo.org/glsa/202008-24 - Third Party Advisory () https://security.gentoo.org/glsa/202008-24 - Third Party Advisory
References (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00027.html - Mailing List, Third Party Advisory () http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00027.html - Mailing List, Third Party Advisory
References (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00041.html - Mailing List, Third Party Advisory () http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00041.html - Mailing List, Third Party Advisory
References (DEBIAN) https://www.debian.org/security/2020/dsa-4734 - Third Party Advisory () https://www.debian.org/security/2020/dsa-4734 - Third Party Advisory
References (MISC) https://www.oracle.com/security-alerts/cpujul2020.html - Patch, Vendor Advisory () https://www.oracle.com/security-alerts/cpujul2020.html - Patch, Vendor Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/ - Third Party Advisory
References (SUSE) http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00019.html - Mailing List, Third Party Advisory () http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00019.html - Mailing List, Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/ - Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/ - Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/ - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2020/08/msg00021.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2020/08/msg00021.html - Mailing List, Third Party Advisory
References (UBUNTU) https://usn.ubuntu.com/4433-1/ - Third Party Advisory () https://usn.ubuntu.com/4433-1/ - Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202209-15 - Third Party Advisory () https://security.gentoo.org/glsa/202209-15 - Third Party Advisory
References (UBUNTU) https://usn.ubuntu.com/4453-1/ - Third Party Advisory () https://usn.ubuntu.com/4453-1/ - Third Party Advisory
References (CONFIRM) https://security.netapp.com/advisory/ntap-20200717-0005/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20200717-0005/ - Third Party Advisory
CVSS v2 : 5.8
v3 : 4.8 		v2 : 5.8
v3 : unknown
First Time Oracle openjdk
CPE cpe:2.3:a:oracle:openjdk:8:update231:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone4:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update192:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update222:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update202:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone9:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update221:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:-:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update11:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update162:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone8:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update242:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update211:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone5:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone3:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update131:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update112:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update102:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update20:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update232:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update172:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update161:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update212:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:11.0.7:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11:*:*:*:*:*:*:*
cpe:2.3:a:oracle:jre:14.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:13:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update201:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone1:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.6:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update121:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:14:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update111:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update252:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update191:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone6:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.2:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update241:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update181:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update101:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update141:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update171:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone2:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update151:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update25:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:update152:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:8:milestone7:*:*:*:*:*:*
cpe:2.3:a:oracle:openjdk:11.0.5:*:*:*:*:*:*:*

07 Nov 2023, 03:17

Type Values Removed Values Added
References
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/', 'name': 'FEDORA-2020-93cc9c3ef2', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/', 'name': 'FEDORA-2020-5d0b4a2b5b', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/', 'name': 'FEDORA-2020-e418151dc3', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/', 'name': 'FEDORA-2020-508df53719', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QQUMIAON2YEFRONMIUVHAKYCIOLICDBA/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFZ36XIW5ENQAW6BB7WHRFFTTJX7KGMR/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MEPHBZPNSLX43B26DWKB7OS6AROTS2BO/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CFJPOYF3CWYEPCDOAOCNFJTQIKKWPHW/ -
Information

Published : 2020-07-15 18:15

Updated : 2025-05-27 16:35

NVD link : CVE-2020-14556

Mitre link : CVE-2020-14556

JSON object : View

Products Affected

netapp

  • snapmanager
  • oncommand_insight
  • e-series_santricity_web_services
  • active_iq_unified_manager
  • cloud_backup
  • storagegrid
  • e-series_santricity_os_controller
  • 7-mode_transition_tool
  • steelstore_cloud_integrated_storage
  • e-series_performance_analyzer
  • santricity_unified_manager
  • oncommand_workflow_automation
  • cloud_secure_agent

canonical

  • ubuntu_linux

debian

  • debian_linux

fedoraproject

  • fedora

oracle

  • jre
  • jdk
  • openjdk

opensuse

  • leap
CWE
NVD-CWE-noinfo