Out-of-bound pointer arithmetic in inftrees.c
CVE: CVE-2016-9840
Component: zlib
CWE: CWE-125
Severity: Low
CVSS v3: 8.7/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Release date: 2016-09-22T00:00:00+00:00

A vulnerability was discovered in the inftrees.c file of zlib. Pointer arithmetic operations violate the C standard by subtracting an offset from an array pointer before its allocated memory, leading to undefined behavior.

Statement: While this undefined behavior does not currently manifest as an exploitable issue on Red Hat Enterprise Linux systems using GCC compilers, it could become problematic with future compiler implementations. This flaw affects various Java packages in Red Hat Enterprise Linux 6 and 7, but native zlib packages in Red Hat Enterprise Linux are not impacted due to the specific compiler implementation used.

Remediation:
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 Oracle Java must be restarted for this update to take effect.
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 Oracle Java must be restarted for this update to take effect.
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 Oracle Java must be restarted for this update to take effect.
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 IBM Java must be restarted for this update to take effect.
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 IBM Java must be restarted for this update to take effect.
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 IBM Java must be restarted for this update to take effect.
For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

For this update to take effect, Red Hat Satellite must be restarted ("/usr/sbin/rhn-satellite restart"). All running instances of IBM Java must be restarted for this update to take effect.
For OpenShift Container Platform 4.17 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:0c2421a241e95f56895906885e7f7e53cb1520ee6a82db5cdeea98f5f65457d7

      (For s390x architecture)
      The image digest is sha256:542000db3d3c126ab0c88f24e7e238de66a743026b95b603d311204dcb36132e

      (For ppc64le architecture)
      The image digest is sha256:7482c48c0cdefbe9f88e0ddd748a6f00e1d2cc1fbd395a8270425a48d758a0c2

      (For aarch64 architecture)
      The image digest is sha256:930640a1fabd9bd84756bd35e5e5518e3e5576d5a22954698b6456729fb996e8

All OpenShift Container Platform 4.17 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html-single/updating_clusters/index#updating-cluster-cli.
For OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:

https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/

You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at
https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.

The sha values for the release are as follows:

      (For x86_64 architecture)
      The image digest is sha256:0dac222584991f89a123d85e8c3055f0056e5876fc209b8d4bea7a59e7504d59

      (For s390x architecture)
      The image digest is sha256:33f8af4513fc5394c3210f5a3b447f4920cc9bd099830479d05f3799ae80f0a5

      (For ppc64le architecture)
      The image digest is sha256:8e522017e74e046cf57a76545fe6cc2cd742a79ff17bc22d66eee5126e5907c4

      (For aarch64 architecture)
      The image digest is sha256:12d59fd82eb938b06896679cc9a821651a2b05fdf74d0d23e528977f0fb11461

All OpenShift Container Platform 4.18 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at
https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.