[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELSA-2023-13019)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2023-13019 can now be patched using Ksplice
CVEs: CVE-2023-39192 CVE-2023-39193 CVE-2023-4207 CVE-2023-45862 CVE-2023-4911

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2023-13019.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2023-13019.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and OL7 install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2023-4911: Buffer overflow in the GNU C Library's dynamic loader while processing environment variables.

Incorrect processing of environment variables in the GNU C Library's
dynamic loader ld.so can result in buffer overflow. This flaw could
allow a local attacker to elevate their privileges when launching
binaries with SUID permission.


* CVE-2023-4207: Use-after-free in netfilter classifiers.

Incorrectly copied structures in the cls_fw netfilter classifier can
lead to a use-after-free when updating a filter bound to a class. An
attacker could use this flaw for privilege escalation or cause a
denial-of-service.

Orabug: 35707466


* CVE-2023-39192: Out-of-bounds access in Netfilter xt_u32 module.

Incomplete input validation in Netfilter xt_u32 extension module
allows a local privileged user to cause an out-of-bounds read.  This can
lead to a denial-of-service or information disclosure.

Orabug: 35923470


* CVE-2023-39193: Out-of-bounds access in Netfilter xt_sctp module.

Incomplete input validation in Netfilter xt_sctp extension module allows a
local user with CAP_NET_ADMIN privileges to cause an out-of-bounds read.  This
can lead to a denial-of-service or information disclosure.

Orabug: 35923500


* CVE-2023-45862: Out-of-bounds read in USB ENE card reader when reading bootblock.

An incorrect allocation size when allocating a page buffer could lead to
a memory out-of-bounds array read. A local user with physical access
could potentially use this flaw to leak kernel memory or cause a
denial-of-service.

Orabug: 35924058

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.