Skip to navigation Skip to main content

Utilities

  • Subscriptions
  • Downloads
  • Red Hat Console
  • Get Support
Red Hat Customer Portal
  • Subscriptions
  • Downloads
  • Red Hat Console
  • Get Support
  • Products

    Top Products

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform
    All Products

    Downloads and Containers

    • Downloads
    • Packages
    • Containers

    Top Resources

    • Documentation
    • Product Life Cycles
    • Product Compliance
    • Errata
  • Knowledge

    Red Hat Knowledge Center

    • Knowledgebase Solutions
    • Knowledgebase Articles
    • Customer Portal Labs
    • Errata

    Top Product Docs

    • Red Hat Enterprise Linux
    • Red Hat OpenShift
    • Red Hat Ansible Automation Platform
    All Product Docs

    Training and Certification

    • About
    • Course Index
    • Certification Index
    • Skill Assessment
  • Security

    Red Hat Product Security Center

    • Security Updates
    • Security Advisories
    • Red Hat CVE Database
    • Errata

    References

    • Security Bulletins
    • Severity Ratings
    • Security Data

    Top Resources

    • Security Labs
    • Backporting Policies
    • Security Blog
  • Support

    Red Hat Support

    • Support Cases
    • Troubleshoot
    • Get Support
    • Contact Red Hat Support

    Red Hat Community Support

    • Customer Portal Community
    • Community Discussions
    • Red Hat Accelerator Program

    Top Resources

    • Product Life Cycles
    • Customer Portal Labs
    • Red Hat JBoss Supported Configurations
    • Red Hat Lightspeed
Or troubleshoot an issue.

Select Your Language

  • English
  • Français
  • 한국어
  • 日本語
  • 中文 (中国)

Infrastructure and Management

  • Red Hat Enterprise Linux
  • Red Hat Satellite
  • Red Hat Subscription Management
  • Red Hat Lightspeed
  • Red Hat Ansible Automation Platform

Cloud Computing

  • Red Hat OpenShift
  • Red Hat OpenStack Platform
  • Red Hat OpenShift
  • Red Hat OpenShift AI
  • Red Hat OpenShift Dedicated
  • Red Hat Advanced Cluster Security for Kubernetes
  • Red Hat Advanced Cluster Management for Kubernetes
  • Red Hat Quay
  • Red Hat OpenShift Dev Spaces
  • Red Hat OpenShift Service on AWS

Storage

  • Red Hat Gluster Storage
  • Red Hat Hyperconverged Infrastructure
  • Red Hat Ceph Storage
  • Red Hat OpenShift Data Foundation

Runtimes

  • Red Hat Runtimes
  • Red Hat JBoss Enterprise Application Platform
  • Red Hat Data Grid
  • Red Hat JBoss Web Server
  • Red Hat build of Keycloak
  • Red Hat support for Spring Boot
  • Red Hat build of Node.js
  • Red Hat build of Quarkus

Integration and Automation

  • Red Hat Application Foundations
  • Red Hat Fuse
  • Red Hat AMQ
  • Red Hat 3scale API Management
All Products
Red Hat Product Errata RHSA-2023:4172 - Security Advisory
Issued:
2023-07-19
Updated:
2023-07-19

RHSA-2023:4172 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: java-1.8.0-openjdk security update

Type/Severity

Security Advisory: Moderate

Red Hat Lightspeed patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for java-1.8.0-openjdk is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The java-1.8.0-openjdk packages provide the OpenJDK 8 Java Runtime Environment and the OpenJDK 8 Java Software Development Kit.

Security Fix(es):

  • OpenJDK: improper handling of slash characters in URI-to-path conversion (8305312) (CVE-2023-22049)
  • OpenJDK: array indexing integer overflow issue (8304468) (CVE-2023-22045)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

All running instances of OpenJDK Java must be restarted for this update to take effect.

Affected Products

  • Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64
  • Red Hat Enterprise Linux Server - AUS 8.4 x86_64
  • Red Hat Enterprise Linux Server - TUS 8.4 x86_64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64

Fixes

  • BZ - 2221645 - CVE-2023-22045 OpenJDK: array indexing integer overflow issue (8304468)
  • BZ - 2221647 - CVE-2023-22049 OpenJDK: improper handling of slash characters in URI-to-path conversion (8305312)

CVEs

  • CVE-2023-22045
  • CVE-2023-22049

References

  • https://access.redhat.com/security/updates/classification/#moderate
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4

SRPM
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.src.rpm SHA-256: 00329a46083593aa1e5fa708ec0d8ae9043631088bab8e87c5f1dec3353df80c
x86_64
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3f1fb82f4bdbcb832c3591e9b0e2b464d169d7e2455cf7a014d2c0628a3a2cfb
java-1.8.0-openjdk-accessibility-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2cb3846ba803d255fcb6c1bb0517c89b08f32b93b814535d60d055209850118e
java-1.8.0-openjdk-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 6fb462a284f3b2fd424e4502877bf44e5f96f8ab08dc9336698aaa55bb456247
java-1.8.0-openjdk-debugsource-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 694d960e8146f8fd49317fae197aea64f26572c37436571f32c8d54328c4ba5e
java-1.8.0-openjdk-demo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3dc8164577756b8a5987e18e25ae5644795b3f225c91d9b1b200d1705c815466
java-1.8.0-openjdk-demo-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: dc64aed5fd9486b49b7c063e2f56e3c0e2eb510fa3a158ba90e7d4db638fa7f9
java-1.8.0-openjdk-devel-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 63b088de3a4e54d2071443d9711336bb305f761bf6c3bef5a5f16967391506b5
java-1.8.0-openjdk-devel-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 5104c078a096cd970f37a263319816790cac5031a6bab97545be24c2a52bd9de
java-1.8.0-openjdk-headless-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: ccea9cd6cf3284e76cd0b78059176bb261f221b08b96b5c1fe2b1adb04413319
java-1.8.0-openjdk-headless-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: f38e4d1486dac00e5cfde17e707f247a2dd89709bdefb8d075709949a3709f2d
java-1.8.0-openjdk-javadoc-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: 065c8f9f4ac2728ac5ed90c53d9e981c18daec7095c961c025afb5154645bab1
java-1.8.0-openjdk-javadoc-zip-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: b4759ed98bb78c7ad598e298dffddababd3404a8d375cd713671318be81d8871
java-1.8.0-openjdk-src-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2c3f93ad1f19ff3035e9fd052333b4f92ce891259ea1bf7f5fdfd23fde38497c

Red Hat Enterprise Linux Server - AUS 8.4

SRPM
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.src.rpm SHA-256: 00329a46083593aa1e5fa708ec0d8ae9043631088bab8e87c5f1dec3353df80c
x86_64
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3f1fb82f4bdbcb832c3591e9b0e2b464d169d7e2455cf7a014d2c0628a3a2cfb
java-1.8.0-openjdk-accessibility-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2cb3846ba803d255fcb6c1bb0517c89b08f32b93b814535d60d055209850118e
java-1.8.0-openjdk-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 6fb462a284f3b2fd424e4502877bf44e5f96f8ab08dc9336698aaa55bb456247
java-1.8.0-openjdk-debugsource-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 694d960e8146f8fd49317fae197aea64f26572c37436571f32c8d54328c4ba5e
java-1.8.0-openjdk-demo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3dc8164577756b8a5987e18e25ae5644795b3f225c91d9b1b200d1705c815466
java-1.8.0-openjdk-demo-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: dc64aed5fd9486b49b7c063e2f56e3c0e2eb510fa3a158ba90e7d4db638fa7f9
java-1.8.0-openjdk-demo-fastdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: a8d1d3eaee93190d355317a755845d3a8a99b278afeb1d96c8fa781741876fd4
java-1.8.0-openjdk-demo-slowdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 6df8df1a76d4b06cf51b9c8298b3e4410ac2f51990cf95aa7e620f55e8ef393a
java-1.8.0-openjdk-devel-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 63b088de3a4e54d2071443d9711336bb305f761bf6c3bef5a5f16967391506b5
java-1.8.0-openjdk-devel-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 5104c078a096cd970f37a263319816790cac5031a6bab97545be24c2a52bd9de
java-1.8.0-openjdk-devel-fastdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 9760b9b6302ce416584ca7efd6f6e93e2bbc0a2de699e7ef0edb621b4d18a7d2
java-1.8.0-openjdk-devel-slowdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: e24b0fb649ae780dd6e4adb9903c16b498799fa3ddfca4a499cebb1c73359bcc
java-1.8.0-openjdk-fastdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 7516ac113cbb969bb0d8038152ed897ce621f9884ca391d7ab4bd7b593b50924
java-1.8.0-openjdk-headless-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: ccea9cd6cf3284e76cd0b78059176bb261f221b08b96b5c1fe2b1adb04413319
java-1.8.0-openjdk-headless-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: f38e4d1486dac00e5cfde17e707f247a2dd89709bdefb8d075709949a3709f2d
java-1.8.0-openjdk-headless-fastdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 8f68535d8255431fef9fcdd2972f1bec06988e2ad1f58bad6c91eab0dec08c00
java-1.8.0-openjdk-headless-slowdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: f1ecc0b06936046a83d8f5d5f35f3939b4b42f49602ad8d5a6942a54935df30f
java-1.8.0-openjdk-javadoc-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: 065c8f9f4ac2728ac5ed90c53d9e981c18daec7095c961c025afb5154645bab1
java-1.8.0-openjdk-javadoc-zip-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: b4759ed98bb78c7ad598e298dffddababd3404a8d375cd713671318be81d8871
java-1.8.0-openjdk-slowdebug-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 95caa3352ca29a455ee42b1a0c40420cb61f6f1eb2730eedf539400b34a5c03b
java-1.8.0-openjdk-src-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2c3f93ad1f19ff3035e9fd052333b4f92ce891259ea1bf7f5fdfd23fde38497c

Red Hat Enterprise Linux Server - TUS 8.4

SRPM
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.src.rpm SHA-256: 00329a46083593aa1e5fa708ec0d8ae9043631088bab8e87c5f1dec3353df80c
x86_64
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3f1fb82f4bdbcb832c3591e9b0e2b464d169d7e2455cf7a014d2c0628a3a2cfb
java-1.8.0-openjdk-accessibility-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2cb3846ba803d255fcb6c1bb0517c89b08f32b93b814535d60d055209850118e
java-1.8.0-openjdk-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 6fb462a284f3b2fd424e4502877bf44e5f96f8ab08dc9336698aaa55bb456247
java-1.8.0-openjdk-debugsource-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 694d960e8146f8fd49317fae197aea64f26572c37436571f32c8d54328c4ba5e
java-1.8.0-openjdk-demo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3dc8164577756b8a5987e18e25ae5644795b3f225c91d9b1b200d1705c815466
java-1.8.0-openjdk-demo-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: dc64aed5fd9486b49b7c063e2f56e3c0e2eb510fa3a158ba90e7d4db638fa7f9
java-1.8.0-openjdk-devel-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 63b088de3a4e54d2071443d9711336bb305f761bf6c3bef5a5f16967391506b5
java-1.8.0-openjdk-devel-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 5104c078a096cd970f37a263319816790cac5031a6bab97545be24c2a52bd9de
java-1.8.0-openjdk-headless-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: ccea9cd6cf3284e76cd0b78059176bb261f221b08b96b5c1fe2b1adb04413319
java-1.8.0-openjdk-headless-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: f38e4d1486dac00e5cfde17e707f247a2dd89709bdefb8d075709949a3709f2d
java-1.8.0-openjdk-javadoc-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: 065c8f9f4ac2728ac5ed90c53d9e981c18daec7095c961c025afb5154645bab1
java-1.8.0-openjdk-javadoc-zip-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: b4759ed98bb78c7ad598e298dffddababd3404a8d375cd713671318be81d8871
java-1.8.0-openjdk-src-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2c3f93ad1f19ff3035e9fd052333b4f92ce891259ea1bf7f5fdfd23fde38497c

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4

SRPM
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.src.rpm SHA-256: 00329a46083593aa1e5fa708ec0d8ae9043631088bab8e87c5f1dec3353df80c
ppc64le
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: c5d2ada5141cf8e1a9e4ca26e97db98d2431940828f58f5786c3521a48e811d0
java-1.8.0-openjdk-accessibility-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: e0a5610718de51a996ed53165ba484fe5114f871693773e59c6ff0c900839e65
java-1.8.0-openjdk-debuginfo-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: 1fc7983c48a144ab0a0ac978074b053c08ca993ae06e637c1c4e5fc65484da51
java-1.8.0-openjdk-debugsource-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: 5d6b449744753d4d8660f6642c2112a8a4355f8f850d9bcab574ad15a8567131
java-1.8.0-openjdk-demo-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: 7d6d70efe7004d20b0ae54b3dad23cf0bc865e21143f00734b7b05c8740a87d0
java-1.8.0-openjdk-demo-debuginfo-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: e332b98a857cb74002c95058e38955a07f37f8c435794d1f58f2d95cfc196d12
java-1.8.0-openjdk-devel-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: cc5c7068d05a7b4828ae0c1857fad15295e9388efb80b2ea9c1496511883b6c9
java-1.8.0-openjdk-devel-debuginfo-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: 692e4a70ec05099bcefb9af26320e775a51a4d5e666e4f2ed71be089885dbb5b
java-1.8.0-openjdk-headless-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: be80d29a99b57a77dc2fedff88524dfb49cde42340284e4e990110065131beef
java-1.8.0-openjdk-headless-debuginfo-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: cd5d7ced8ec532c61bcfafa06e7bbe7ab9d64b94938313d053415d5627718610
java-1.8.0-openjdk-javadoc-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: 065c8f9f4ac2728ac5ed90c53d9e981c18daec7095c961c025afb5154645bab1
java-1.8.0-openjdk-javadoc-zip-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: b4759ed98bb78c7ad598e298dffddababd3404a8d375cd713671318be81d8871
java-1.8.0-openjdk-src-1.8.0.382.b05-1.el8_4.ppc64le.rpm SHA-256: 0edff25e7b4bb5bc77a1d3e55fef9c15772f065f64fa21925af297deb71714fb

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4

SRPM
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.src.rpm SHA-256: 00329a46083593aa1e5fa708ec0d8ae9043631088bab8e87c5f1dec3353df80c
x86_64
java-1.8.0-openjdk-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3f1fb82f4bdbcb832c3591e9b0e2b464d169d7e2455cf7a014d2c0628a3a2cfb
java-1.8.0-openjdk-accessibility-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2cb3846ba803d255fcb6c1bb0517c89b08f32b93b814535d60d055209850118e
java-1.8.0-openjdk-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 6fb462a284f3b2fd424e4502877bf44e5f96f8ab08dc9336698aaa55bb456247
java-1.8.0-openjdk-debugsource-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 694d960e8146f8fd49317fae197aea64f26572c37436571f32c8d54328c4ba5e
java-1.8.0-openjdk-demo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 3dc8164577756b8a5987e18e25ae5644795b3f225c91d9b1b200d1705c815466
java-1.8.0-openjdk-demo-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: dc64aed5fd9486b49b7c063e2f56e3c0e2eb510fa3a158ba90e7d4db638fa7f9
java-1.8.0-openjdk-devel-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 63b088de3a4e54d2071443d9711336bb305f761bf6c3bef5a5f16967391506b5
java-1.8.0-openjdk-devel-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 5104c078a096cd970f37a263319816790cac5031a6bab97545be24c2a52bd9de
java-1.8.0-openjdk-headless-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: ccea9cd6cf3284e76cd0b78059176bb261f221b08b96b5c1fe2b1adb04413319
java-1.8.0-openjdk-headless-debuginfo-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: f38e4d1486dac00e5cfde17e707f247a2dd89709bdefb8d075709949a3709f2d
java-1.8.0-openjdk-javadoc-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: 065c8f9f4ac2728ac5ed90c53d9e981c18daec7095c961c025afb5154645bab1
java-1.8.0-openjdk-javadoc-zip-1.8.0.382.b05-1.el8_4.noarch.rpm SHA-256: b4759ed98bb78c7ad598e298dffddababd3404a8d375cd713671318be81d8871
java-1.8.0-openjdk-src-1.8.0.382.b05-1.el8_4.x86_64.rpm SHA-256: 2c3f93ad1f19ff3035e9fd052333b4f92ce891259ea1bf7f5fdfd23fde38497c

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

Red Hat LinkedIn YouTube Facebook X, formerly Twitter

Quick Links

  • Downloads
  • Subscriptions
  • Support Cases
  • Customer Service
  • Product Documentation

Help

  • Contact Us
  • Customer Portal FAQ
  • Log-in Assistance

Site Info

  • Trust Red Hat
  • Browser Support Policy
  • Accessibility
  • Awards and Recognition
  • Colophon

Related Sites

  • redhat.com
  • developers.redhat.com
  • connect.redhat.com
  • cloud.redhat.com

Red Hat legal and privacy links

  • About Red Hat
  • Jobs
  • Events
  • Locations
  • Contact Red Hat
  • Red Hat Blog
  • Inclusion at Red Hat
  • Cool Stuff Store
  • Red Hat Summit
© 2025 Red Hat

Red Hat legal and privacy links

  • Privacy statement
  • Terms of use
  • All policies and guidelines
  • Digital accessibility