sssctlruncommand() is a wrapper for running commands via a shell, using glibc's system() function call. sssctlcacheexpire() and sssctllogsfetch() allow user provided arguments, and pass them to sssctlruncommand() sssctl is limited to root user, however, if an administrator allows unprivileged users to provide arguments to the command (e.g.: via sudo), this could be used to elevate privileges via a shell injection.
Although there are no known default configuration where this flaw could be exploited, the admin could have manually created sudo rules to let regular users use sssctl commands, or could be tricked into running a specially crafted sssctl command.
References:
https://sssd.io/release-notes/sssd-2.6.0.html
A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include maxworkerprocesses=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.
A flaw was found in ovirt-engine, which leads to the logging of plaintext passwords in the log file when using otapi-style. This flaw allows an attacker with sufficient privileges to read the log file, leading to confidentiality loss.
A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nwproto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.
Gleb Napatov found a bug in KVM that can be used to crash the host on Intel machines. If emulator is tricked into emulating mov to/from DR instruction it causes NULL pointer dereference on VMX since kvmx86ops->(set|get)dr are not initialized. Recently this is not exploitable from guest userspace, but malicious guest kernel can trigger it easily.
It was discovered that in the ovirt's REST API before version 4.3.2.1, RemoveDiskCommand is triggered as an internal command, meaning the permission validation that should be performed against the calling user is skipped. A user with low privileges (eg Basic Operations) could exploit this flaw to delete disks attached to guests.
A flaw was found in cockpit web server that may lead to denial of server through sending crafted invalid base64 headers.
References:
https://bugzilla.redhat.com/showbug.cgi?id=1659542
Upstream issue:
https://github.com/cockpit-project/cockpit/pull/10819
Upstream patch:
https://github.com/cockpit-project/cockpit/commit/c51f6177576d7e12
Last updated 24 July 2024
A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.
A denial of service vulnerability was found in rsyslog in the imptcp module. An attacker could send a specially crafted message to the imptcp socket, which would cause rsyslog to crash.
An input validation vulnerability was found in Ansible's mysqluser module before 2.2.1.0, which may fail to correctly change a password in certain circumstances. Thus the previous password would still be active when it should have been changed.
Buffer overflow in the jasstreamprintf function in libjasper/base/jasstream.c in JasPer 1.900.1 might allow context-dependent attackers to have an unknown impact via vectors related to the mifhdrput function and use of vsprintf.
The pollmodeio file for the megaraidsas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.
Array index error in the gdthreadevent function in drivers/scsi/gdth.c in the Linux kernel before 2.6.32-rc8 allows local users to cause a denial of service or possibly gain privileges via a negative event index in an IOCTL request.
arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.31.4 on the x8664 platform does not clear certain kernel registers before a return to user mode, which allows local users to read register values from an earlier process by switching an ia32 process to 64-bit mode.
Izik Eidus found a bug in QEMU that allows priviledged guest user to force QEMU process on the host to issue free() and/or malloc() calls at addresses controlled by the guest user. The bug is in QXL/libspice code.
Izik Eidus found a bug in QEMU that allows priviledged guest user to touch arbitrary memory in the hosting QEMU process. The bug is in QXL code. Guest and host share region of memory and use it to communicate with each other. Malicious user can use the lack of validation of pointers embedded into data structures in this memory area to touch host's abitrary memory location and/or make the hosting QEMU process crash by dereferencing invalid pointer.
Izik Eidus found a bug in QEMU that allows priviledged guest user to touch arbitrary memory in the hosting QEMU process. The bug is in QXL/libspice code. Guest and host share region of memory and use it to communicate with each other. Malicious user can use the lack of validation of pointers embedded into data structures in this memory area to touch host's abitrary memory location and/or make the hosting QEMU process crash by dereferencing invalid pointer.
A buffer overflow flaw was found in the way e1000 emulated device driver of QEMU, a FAST! processor emulator, processed received large e1000 packets, when the SBP and LPE flags were disabled. If the underlying network was configured to allow large (jumbo) packets, a remote attacker could use this flaw to cause relevant guest in question to crash (DoS) or, potentially, the attacker could use this flaw to execute arbitrary code on the guest system with the kernel level privilege.
References: [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=696051 [2] http://www.openwall.com/lists/oss-security/2012/12/19/9 [3] http://thread.gmane.org/gmane.comp.emulators.qemu/182666 [4] http://www.openwall.com/lists/oss-security/2013/01/17/12
Relevant upstream patches: [5] http://git.qemu.org/?p=qemu.git;a=commitdiff;h=b0d9ffcd0251161c7c92f94804dcf599dfa3edeb http://git.qemu.org/?p=qemu.git;a=commitdiff;h=2c0331f4f7d241995452b99afaf0aab00493334a
Both virtio-block and virtio-serial read, VirtQueueElements are read in as buffers, and passed to virtqueuemapsg(), where numsg is taken from the wire and can force writes to indicies beyond VIRTQUEUEMAXSIZE.
An user able to alter the savevm data (either on the disk or over the wire during migration) could use this flaw to to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process.
Upstream fix: ------------- -> http://git.qemu.org/?p=qemu.git;a=commit;h=36cf2a37132c7f01fa9adb5f95f5312b27742fd4
It was found that fix for CVE-2013-0167 was not complete. A privileged guest user could still potentially make the host the guest is running on unavailable to the management server by making guest agent return data with invalid XML characters.
Upstream fix: http://gerrit.ovirt.org/gitweb?p=vdsm.git;a=commit;h=5fe1615b7949999fc9abd896bde63bf24f8431d6
Acknowledgements:
This issue was found by David Gibson of Red Hat.
A cross-site scripting (XSS) flaw was found in the RedirectServlet of the oVirt Engine and Red Hat Enterprise Virtualization Manager (RHEV-M). A remote attacker could provide a specially-crafted link, that when visited by an unsuspecting RHEV-M / oVirt user would lead to arbitrary script execution in the context of the RHEV-M / oVirt domain. Access to the RedirectServlet does not require authentication.
Stack-based buffer overflow in the redshandleticket function in server/reds.c in SPICE 0.12.0 allows remote attackers to cause a denial of service (crash) via a long password in a SPICE ticket.
Buffer overflow in the SCSI implementation in QEMU, as used in Xen, when a SCSI controller has more than 256 attached devices, allows local users to gain privileges via a small transfer buffer in a REPORT LUNS command.
Insecure temporary file vulnerability in RedHat vsdm 4.9.6.
An unquoted search path flaw was found in the way Spice service for Windows was installed into the system.
A local unprivileged user could use this flaw to increase their privileges.
References:
http://cwe.mitre.org/data/definitions/428.html
Unquoted Windows search path vulnerability in Red Hat Enterprise Virtualization (RHEV) 3 and 3.2 allows local users to gain privileges via a crafted application in an unspecified folder.
A flaw was found in the way processing of unexpected fields in guestInfo dictionary were handled. A privileged guest user can potentially make the host the VM runs on unavailable to the managment server.
Acknowledgements:
This issue was discovered by Dan Kenigsberg of the Red Hat Enterprise Virtualization team.
vdsm and vdsclient does not validate certficate hostname from another vdsm which could facilitate a man-in-the-middle attack
Dan Kenigsberg of Red Hat reports:
Description of problem: In numerous places, ovirt-node puts an input string on a command line, without safely quoting it. With this, whoever controls the input string may gain complete control on the host.
For example, http://gerrit.ovirt.org/gitweb?p=ovirt-node.git;a=blob;f=src/ovirtnode/ovirtfunctions.py;h=caef7ef019ca12b49aa3c030792538956fb4caad;hb=e11e02cd9256c854dd0419515097637d6829b4f1#l1091
"ls '%s'" % filename
is not going to end up well if the filename is actually "bla\'; rm -fr /; echo \'". pipes.quote() or its like must be used in such occasions.
It may be safer to disallow shell=True completely (but would require to avoid in-shell pipes).
Version-Release number of selected component (if applicable): ovirt-node-3.0.0-474-gb852fd7