Security

It was found that ABRT was vulnerable to multiple race condition and symbolic link flaws. A local attacker could use these flaws to potentially escalate their privileges on the system. (CVE-2015-3315)

It was discovered that the kernel-invoked coredump processor provided by ABRT wrote core dumps to files owned by other system users. This could result in information disclosure if an application crashed while its current directory was a directory writable to by other users (such as /tmp). (CVE-2015-3142)

It was discovered that the default event handling scripts installed by ABRT did not handle symbolic links correctly. A local attacker with write access to an ABRT problem directory could use this flaw to escalate their privileges. (CVE-2015-1869)

It was found that the ABRT event scripts created a user-readable copy of an sosreport file in ABRT problem directories, and included excerpts of /var/log/messages selected by the user-controlled process name, leading to an information disclosure. (CVE-2015-1870)

It was discovered that, when moving problem reports between certain directories, abrt-handle-upload did not verify that the new problem directory had appropriate permissions and did not contain symbolic links. An attacker able to create a crafted problem report could use this flaw to expose other parts of ABRT to attack, or to overwrite arbitrary files on the system. (CVE-2015-3147)

Multiple directory traversal flaws were found in the abrt-dbus D-Bus service. A local attacker could use these flaws to read and write arbitrary files as the root user. (CVE-2015-3151)

It was discovered that the abrt-dbus D-Bus service did not properly check the validity of the problem directory argument in the ChownProblemDir, DeleteElement, and DeleteProblem methods. A local attacker could use this flaw to take ownership of arbitrary files and directories, or to delete files and directories as the root user. (CVE-2015-3150)

It was discovered that the abrt-action-install-debuginfo-to-abrt-cache helper program did not properly filter the process environment before invoking abrt-action-install-debuginfo. A local attacker could use this flaw to escalate their privileges on the system. (CVE-2015-3159)

CVE-2015-1158 - Improper Update of Reference Count
Cupsd uses reference-counted strings with global scope. When parsing a print job request, cupsd over-decrements the reference count for a string from the request. As a result, an attacker can prematurely free an arbitrary string of global scope. They can use this to dismantle ACL’s protecting privileged operations, and upload a replacement configuration file, and subsequently run arbitrary code on a target machine.

This bug is exploitable in default configurations, and does not require any special permissions other than the basic ability to print.

CVE-2015-1159 - Cross-Site Scripting
A cross-site scripting bug in the CUPS templating engine allows the above bug to be exploited when a user browses the web. This XSS is reachable in the default configuration for Linux instances of CUPS, and allows an attacker to bypass default configuration settings that bind the CUPS scheduler to the ‘localhost’ or loopback interface.

XML external entity (XXE) vulnerability in Apache Jackrabbit before 2.0.6, 2.2.x before 2.2.14, 2.4.x before 2.4.6, 2.6.x before 2.6.6, 2.8.x before 2.8.1, and 2.10.x before 2.10.1 allows remote attackers to read arbitrary files and send requests to intranet servers via a crafted WebDAV request.

An information disclosure flaw due to incorrect JkMount/JkUnmount directives processing was found in the Apache 2 module mod_jk to forward requests from the Apache web server to Tomcat. A JkUnmount rule for a subtree of a previous JkMount rule could be ignored. This could allow a remote attacker to potentially access a private artifact in a tree that would otherwise not be accessible to them.

Handling of the SSL_VERIFY_OPTIONAL authmode was changed to make sure that information about keyUsage and extendedKeyUsage was properly propagated and accessible to the calling function. Just as a reminder, SSL_VERIFY_REQUIRED is the recommended security setting for authmode.

A team of security researchers dove back into the Lucky 13 issue and found potential weaknesses in SSL implementations when the attacker can execute code on the same physical machine. mbed TLS was modified to always generate a cache miss and make sure that attackers gain no information from that event.

Several buffer overflows have been found in pcre <= 8.37. By compiling a crafted regular expression, it is possible to write more than the expected size into various buffers, allowing arbitrary code execution.

It was found that the pcs daemon did not sign cookies containing session data that were sent to clients connecting via the pcsd web UI. A remote attacker could use this flaw to forge cookies and bypass authorization checks, possibly gaining elevated privileges in the pcsd web UI.

The XSRF token is now encoded with a random mask on each request. This makes it safe to include in compressed pages without being vulnerable to the BREACH attack. This applies to most applications that use both the xsrf_cookies and gzip options (or have gzip applied by a proxy).

Matt Tait discovered that QEMU incorrectly handled the virtual PCNET driver. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2015-3209)

Kurt Seifried discovered that QEMU incorrectly handled certain temporary files. A local attacker could use this issue to cause a denial of service. (CVE-2015-4037)

Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the host MSI message data field. A malicious guest could use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4103)

Jan Beulich discovered that the QEMU Xen code incorrectly restricted access to the PCI MSI mask bits. A malicious guest could use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4104)

Jan Beulich discovered that the QEMU Xen code incorrectly handled MSI-X error messages. A malicious guest could use this issue to cause a denial of service. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4105)

Jan Beulich discovered that the QEMU Xen code incorrectly restricted write access to the PCI config space. A malicious guest could use this issue to cause a denial of service, obtain sensitive information, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. (CVE-2015-4106)

Cross-site scripting (XSS) vulnerability in the management plugin in RabbitMQ 2.1.0 through 3.4.x before 3.4.1 allows remote attackers to inject arbitrary web script or HTML via the path info to api/, which is not properly handled in an error message. (CVE-2014-9649)

CRLF injection vulnerability in the management plugin in RabbitMQ 2.1.0 through 3.4.x before 3.4.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the download parameter to api/definitions. (CVE-2014-9650)

Multiple cross-site scripting (XSS) vulnerabilities in the management web UI in the RabbitMQ management plugin before 3.4.3 allow remote authenticated users to inject arbitrary web script or HTML via (1) message details when a message is unqueued, such as headers or arguments; (2) policy names, which are not properly handled when viewing policies; (3) details for AMQP network clients, such as the version; allow remote authenticated administrators to inject arbitrary web script or HTML via (4) user names, (5) the cluster name; or allow RabbitMQ cluster administrators to (6) modify unspecified content. (CVE-2015-0862)

It was discovered that redis, a persistent key-value database, could execute insecure Lua bytecode by way of the EVAL command. This could allow remote attackers to break out of the Lua sandbox and execute arbitrary code.

When an IKEv2 client authenticates the server with certificates and the client authenticates itself to the server using pre-shared key or EAP, the constraints on the server certificate are only enforced by the client after all authentication steps are completed successfully. A rogue server which can authenticate using a valid certificate issued by any CA trusted by the client could trick the user into continuing the authentication, revealing the username and password digest (for EAP) or even the cleartext password (if EAP-GTC is accepted).

It was discovered that the Thermostat web application stored database authentication credentials in a world-readable configuration file. A local user on a system running the Thermostat web application could use this flaw to access and modify monitored JVM data, or perform actions on connected JVMs. (CVE-2015-3201)

Guido Günther detected and reported that replacing "/tmp/zarafa-upgrade-lock" by a symlink makes the zarafa-server process following that symlink and thus allows to overwrite arbitrary files in the filesystem (assuming zarafa-server runs as root which is not case by default at Fedora, but upstream default). One just needs write permissions in /tmp and wait until the zarafa-server is restarted.