This Metasploit module exploits a logic error in OpenSSL by impersonating the server and sending a specially-crafted chain of certificates, resulting in certain checks on untrusted certificates to be bypassed on the client, allowing it to use a valid leaf certificate as a CA certificate to sign a fake certificate. The SSL/TLS session is then proxied to the server allowing the session to continue normally and application data transmitted between the peers to be saved. The valid leaf certificate must not contain the keyUsage extension or it must have at least the keyCertSign bit set (see X509_check_issued function in crypto/x509v3/v3_purp.c); otherwise; X509_verify_cert fails with X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY. This Metasploit module requires an active man-in-the-middle attack.

Red Hat Security Advisory 2015-1508-01 – KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM. A heap buffer overflow flaw was found in the way QEMU’s IDE subsystem handled I/O buffer access while processing certain ATAPI commands. A privileged guest user in a guest with the CDROM drive enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the host’s QEMU process corresponding to the guest.

Red Hat Security Advisory 2015-1499-01 – Chromium is an open-source web browser, powered by WebKit. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Chromium to crash or, potentially, execute arbitrary code with the privileges of the user running Chromium. All Chromium users should upgrade to these updated packages, which contain Chromium version 44.0.2403.89, which corrects these issues. After installing the update, Chromium must be restarted for the changes to take effect.

Debian Linux Security Advisory 3316-1 – Several vulnerabilities have been discovered in OpenJDK, an implementation of the Oracle Java platform, resulting in the execution of arbitrary code, breakouts of the Java sandbox, information disclosure, denial of service or insecure cryptography.

Debian Linux Security Advisory 3317-1 – Several vulnerabilities have been discovered in LXC, the Linux Containers userspace tools.

Debian Linux Security Advisory 3318-1 – Multiple integer overflows have been discovered in Expat, an XML parsing C library, which may result in denial of service or the execution of arbitrary code if a malformed XML file is processed.

Red Hat Security Advisory 2015-1507-01 – KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM. A heap buffer overflow flaw was found in the way QEMU’s IDE subsystem handled I/O buffer access while processing certain ATAPI commands. A privileged guest user in a guest with the CDROM drive enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the host’s QEMU process corresponding to the guest.

Seditio CMS version 1.7.1 suffers from an open redirect vulnerability.