A TOCTOU (time-of-check time-of-use) race condition was found in the way SSSD, System Security Services Daemon, performed copying and removal of (user) directory trees.A local attacker, with permissions to write into directory of the victim, being actively / currently copied / removed via the sssd daemon facility, could use this flaw to conduct symbolic link attacks, leading to their ability to alter / remove directories outside of originally intended, to be modified, directory tree.

This issue was found by Florian Weimer of Red Hat Product Security Team.

Augeas is a configuration management API that represents the contents of config files as a tree in memory for editing, with the edits being written back to the actual file. By default it loads files it understands in a large number of standard system locations (/etc, /boot), but can also open files in a user specified location [1],[2].

It has two save modes of interest, "backup" that keeps the original in PATH.augorig and "newfile" that leaves the file alone, but writes the edited version to PATH.augnew. These can be set via the API [3] or --backup/--new with augtool (CLI tool around the API).

A flaw was found in the current 0.10.0 version and most previous versions. It requires that the directory containing the file to be edited is writable by another user, so this needs the user to explicitly open a file in another location or for a file in a default location to be in a group/world writable directory.

This attack hinges on behaviour to support writing to a bind mount (ticket #32 gives some history [4] relating to oVirt?) when doing the rename fails with EBUSY or EXDEV. Augeas instead opens the file and writes straight into it, see transform.c in clonefile when copyifrenamefails is set from transformsave.

In two of the three, copyifrenamefails is only set if the node /augeas/save/copyifrenamefails is created by the user to enable the behaviour [4]. I think there are three ways to exploit this code.

1) with --backup

When creating PATH.augsave, copyifrenamefails is always set to 1. A bind mount of a single file (or FUSE, enabling non-privileged attacks?) at PATH.augsave would cause the file contents to be written to the bind mounted file.

2) with --new and /augeas/save/copyifrenamefails

As above, but create bind mount at PATH.augnew.

3) with --backup and /augeas/save/copyifrenamefails

Augeas first moves PATH to PATH.augsave for the backup, then renames PATH.augnew to PATH. There's a tiny window in which a bind mount could be created at PATH, so the file contents are written to the bind mounted file.

[1] http://augeas.net/page/Loadingspecificfiles [2] https://github.com/raphink/augeas-sandbox/blob/master/augload [3] http://augeas.net/docs/api.html#saving-the-tree [4] https://fedorahosted.org/augeas/ticket/32

A denial of service vulnerability was discovered in nbdkit 1.12.7, 1.14.1 and 1.15.1. An attacker could connect to the nbdkit service and cause it to perform a large amount of work in initializing backend plugins, by simply opening a connection to the service. This vulnerability could cause resource consumption and degradation of service in nbdkit, depending on the plugins configured on the server-side.

kernel/signal.c in the Linux kernel before 2.6.39 allows local users to spoof the uid and pid of a signal sender via a sigqueueinfo system call.

Secunia CSI Agent 6.0.0.15017 and earlier, 6.0.1.1007 and earlier, and 7.0.0.21 and earlier, when running on Red Hat Linux, uses world-readable and world-writable permissions for /etc/csiaconfig.xml, which allows local users to change CSI Agent configuration by modifying this file.

ipmievd (aka the IPMI event daemon) in OpenIPMI, as used in the ipmitool package 1.8.11 in Red Hat Enterprise Linux (RHEL) 6, Debian GNU/Linux, Fedora 16, and other products uses 0666 permissions for its ipmievd.pid PID file, which allows local users to kill arbitrary processes by writing to this file.

A flaw was found in the kernel's audit by access permission feature which would not record openbyhandleat syscalls.

This does not mean that a user is granted access to resources that they would not be able to. This means that the audit log trail would not contain the log events of access.

Qemu emulator built with the e1000 NIC emulation support is vulnerable to an infinite loop issue. It could occur while processing transmit descriptor data when sending a network packet.

A privileged user inside guest could use this flaw to crash the Qemu instance resulting in DoS.

Upstream fix: ------------- -> https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg01199.html

Unspecified vulnerability in Oracle MySQL Server 5.6.26 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server : Replication.

Unspecified vulnerability in Oracle MySQL 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 and MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10 allows remote authenticated users to affect integrity via unknown vectors related to encryption.

Unspecified vulnerability in Oracle MySQL 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 and MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10 allows remote authenticated users to affect availability via unknown vectors related to InnoDB.

Unspecified vulnerability in Oracle MySQL 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 and MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10 allows remote authenticated users to affect availability via vectors related to DML.

Unspecified vulnerability in Oracle MySQL 5.6.27 and earlier and MariaDB before 10.0.22 and 10.1.x before 10.1.9 allows remote authenticated users to affect availability via unknown vectors related to InnoDB.

Unspecified vulnerability in Oracle MySQL 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 and MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10 allows remote authenticated users to affect availability via vectors related to UDF.

A cross-site scripting (XSS) flaw was found in the way the 'System Details' => 'Details' => 'Custom Info' page of the Red Hat Network Satellite web interface sanitized value (the Description field) of the asset tag / key, assigned to the particular system, created via 'Custom System Info' page. An authenticated Red Hat Network Satellite user could use this flaw to execute arbitrary HTML or web script code via specially-crafted value for the asset 'Custom System Info' key.

Acknowledgements:

Red Hat would like to thank William Hoffmann for reporting this issue.

Last updated 24 July 2024

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: InnoDB). Supported versions that are affected are 8.0.16 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of MySQL Server accessible data.

External References:

http://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

The Libreswan Project has found a vulnerability in the processing of IKEv1 informational exchange packets which are encrypted and integrity protected using the established IKE SA encryption and integrity keys, but as a receiver, the integrity check value was not verified.

Bugzilla issue:

https://bugzilla.redhat.com/showbug.cgi?id=1713512

A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBDOPTSTRUCTUREDREPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.

A use-after-free flaw was found in PackageKitd. In some conditions, the order of cleanup mechanics for a transaction could be impacted. As a result, some memory access could occur on memory regions that were previously freed. Once freed, a memory region can be reused for other allocations and any previously stored data in this memory region is considered lost.

A postinstall script in the dovecot rpm allows local users to read the contents of newly created SSL/TLS key files.

Virt-install(1) utility used to provision new virtual machines has introduced an option '--unattended' to create VMs without user interaction. This option accepts guest VM password as command line arguments. Thus leaking them to others users on the system via process listing. It was introduced recently in the virt-manager v2.2.0 release.

Upstream patch: --------------- -> https://www.redhat.com/archives/virt-tools-list/2019-July/msg00014.html

Reference: ---------- -> https://virt-manager.org/download/ -> https://www.openwall.com/lists/oss-security/2019/07/03/1

The ovirt-engine-provisiondb utility in Red Hat Enterprise Virtualization (RHEV) Engine 4.0 allows local users to obtain sensitive database provisioning information by reading log files.

A flaw was found in the Linux kernel's implementation of RDMA over infiniband. An attacker with a privileged local account can leak kernel stack information when issuing commands to the /dev/infiniband/rdmacm device node. While this access is unlikely to leak sensitive user information, it can be further used to defeat existing kernel protection mechanisms.

A null pointer dereference issue was found in the IDE disk emulator of QEMU. It could occur while cancelling an i/o operation via idecanceldmasync() routine, if a block drive pointer is null. A guest may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch: --------------- -> https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01568.html

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

Oracle Java SE 8u201 fixes an unspecified vulnerability in the Deployment component (CVE-2019-2449). Upstream has CVSS scored this issue as: 3.1/CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

External Reference:

https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html#AppendixJAVA

An unspecified vulnerability in Java SE related to the Networking component could allow an unauthenticated attacker to cause a denial of service resulting in a low availability impact using unknown attack vectors.

Unspecified vulnerability in Oracle MySQL 5.6.27 and earlier and 5.7.9 allows remote authenticated users to affect availability via unknown vectors related to replication.

It was found that the fix for CVE-2012-5887 shipped for tomcat 6 on Red Hat Enterprise Linux 6 (RHSA-2013:0623) was incomplete. The fix only allowed DIGEST authentication to succeed when a stale nonce was provided, rather than when a stale nonce was NOT provided. As a result, DIGEST authentication did not function. However, a man-in-the-middle attacker could record a DIGEST authentication exchange, wait until the associated nonce is marked as stale on the server, then successfully replay this request.