This post was authored by Rich Johnson, William Largent, and Ryan Pentney. Earl Carter contributed to this post.
Cisco Talos, in conjunction with Apple’s security advisory issued on June 30th, is disclosing the discovery of a remote code execution vulnerability within Apple Quicktime. This vulnerability was initially discovered by the Talos Vulnerability Research & Development Team and reported in accordance with responsible disclosure policies to Apple.
There is a remote code execution vulnerability in Apple Quicktime (TALOS-CAN-0018, CVE-2015-3667). An attacker who can control the data inside an stbl atom in a .MOV file can cause an undersized allocation which can lead to an out-of-bounds read. An attacker can use this to create a use-after-free scenario that could lead to remote code execution.
There is a function within QuickTime (QuickTimeMPEG4!0x147f0) which is responsible for processing the data in an hdlr atom. There is a 16-byte memory region, allocated near the beginning of the function, if the hdlr subtype field in an mdia atom is set to ‘vide’, this reference is passed to a set of two functions.
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Tags: 0-day, Apple, research, security, stbl, Talos, vulnerability, vulnerability spotlight
Cisco PSIRT is aware of public exploitation of the Cisco ASA Clientless SSL VPN Portal Customization Integrity Vulnerability identified by Cisco bug ID CSCup36829 (registered customers only) and CVE ID CVE-2014-3393. This vulnerability was disclosed on the 8th of October 2014 in the Cisco Security Advisory: Multiple Vulnerabilities in Cisco ASA Software.
All customers that have customizations applied to their Clientless SSL VPN portal and regardless of the Cisco ASA Software release in use should review the security advisory and this blog post for additional remediation actions.
NOTE: The Cisco Security Advisory: Multiple Vulnerabilities in Cisco ASA Software should be used as the Single Source of Truth (SSoT) for all details of this vulnerability and for any revisions of information going forward. Read More »
Tags: ASA, psirt, security, SSL VPN, vulnerability
As recently as 2013, vulnerabilities involving Java appeared to be a favored tool of adversaries: Java was easy to exploit and, and exploits involving the programming language were difficult to detect. However, as reported in the Cisco 2015 Annual Security Report, Java is losing its front-runner position as a favored tool of bad actors looking to breach network security.
The decline in Java’s high profile as an attack vector in 2014 was recorded by Cisco Security Research. Only one of the top 10 most commonly exploited vulnerabilities in 2014 was related to Java (see chart below). In 2013, Cisco tracked 54 urgent new Java vulnerabilities; in 2014, the number of tracked vulnerabilities fell to just 19. We saw a corresponding decline in reports from the National Vulnerability Database (NVD), which includes all reported vulnerabilities: from 309 Java vulnerabilities in 2013, down to 253 in 2014.
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Tags: 2015 annual security report, attack vector, java, JRE, security, vulnerability
This post was authored by Nick Biasini, Earl Carter, Alex Chiu and Jaeson Schultz
On Tuesday January 27, 2015, security researchers from Qualys published information concerning a 0-day vulnerability in the GNU C library. The vulnerability, known as “GHOST” (a.k.a. CVE-2015-0235), is a buffer overflow in the __nss_hostname_digits_dots() function. As a proof-of-concept, Qualys has detailed a remote exploit for the Exim mail server that bypasses all existing protections, and results in arbitrary command execution. Qualys intends to release the exploit as a Metasploit module.
CVE-2015-0235 affects the functions gethostbyname() and gethostbyname2() –functions originally used to resolve a hostname to an IP address. However, these functions have been deprecated for approximately fifteen years, largely because of their lack of support for IPv6. The superseding function is getaddrinfo() which does support IPv6 and is not affected by this buffer overflow. Programs that still utilize the deprecated gethostbyname() and gethostbyname2() functions may potentially be affected by GHOST.
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Tags: Talos, threat, vulnerability
The Common Vulnerability Scoring System (CVSS) Special Interest Group (SIG), in which Cisco is an active participant, acting on behalf of FIRST.org, has published a preview of the upcoming CVSS v3.0 scoring standard. The CVSS v3.0 preview represents a near final version and includes metric and vector strings, formulas, scoring examples and a v3.0 calculator – all available at the CVSS v3.0 development site. The official public comment period is scheduled to end February 28, 2015 and anyone who produces or consumes CVSS scores are encouraged to review and provide feedback to email@example.com by the close of the comment period.
Tags: Common Vulnerability Scoring System, CVSS, security, vulnerability, vulnerability scoring