Talos is disclosing TALOS-2016-0259 / CVE-2016-8710. An exploitable heap write out of bounds vulnerability exists in the decoding of BPG images in libbpg library. A crafted BPG image decoded by libbpg can cause an integer underflow vulnerability causing an out of bounds heap write leading to remote code execution. This vulnerability can be triggered via attempting to decode a crafted BPG image using libbpg.
BPG (Better Portable Graphics) is an image format created in 2014 based on the HECV video compression standard. BPG has been praised for its ability to produce the same quality image as the well known JPEG format, but in a much smaller file size. Talos is disclosing the presence of a remote code execution vulnerability in the libbpg library which is widely used to support the file format. During the decoding of a BPG, in the `restore_tqb_pixels` function, an attacker controlled integer underflow can occur during the calculation of offsets for the `src` and `dst` operands of a `mempcy`. Because of the underflows, the resulting addresses passed to the `memcpy` are outside the bounds of the original heap structures, resulting in an out of bounds write condition. This vulnerability can be used to create a specially crafted BPG image file which results in remote code execution when opened with any application using a vulnerable version of the libbpg library.
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Discovered by Aleksandar Nikolic of Cisco Talos
Talos is disclosing TALOS-2016-0259 / CVE-2016-9041 an uninitialized memory vulnerability in Adobe Acrobat Reader DC. Adobe Acrobat Reader is one of the largest and well known PDF readers available today.
This particular vulnerability is associated with the JPEG Decoder functionality embedded in the application. A specially crafted PDF document containing a JPEG can be used to trigger this vulnerability which results in a heap-based buffer overflow which can be leveraged to achieve remote code execution. This issue has been resolved in the most recent patch provided by Adobe. The full details surrounding the vulnerability are available here.
The following Snort Rules will detect exploitation attempts. Note that additional rules may be released at a future date and current rules are subject to change pending additional vulnerability information. For the most current rule information, please refer to your FireSIGHT Management Center or Snort.org.
Snort Rule: 41298 – 41305
Locky has been a devastating force for the last year in the spam and ransomware landscape. The Locky variant of ransomware has been responsible for huge amounts of spam messages being sent on a daily basis. The main driver behind this traffic is the Necurs botnet. This botnet is responsible for the majority of Locky and Dridex activity. Periodically Necurs goes offline and during these periods we typically see Locky activity decrease drastically. One of these periods is currently ongoing.
These vulnerabilities were discovered by Aleksandar Nikolic of Cisco Talos.
Oracle’s Outside In Technology (OIT) is a set of SDKs that software developers can use to perform various actions against a large number of different file formats. According to the OIT website: “Outside In Technology is a suite of software development kits (SDKs) that provides developers with a comprehensive solution to extract, normalize, scrub, convert and view the contents of 600 unstructured file formats.” Talos recently discovered vulnerabilities in the RTF and PDF parsers used by OIT that can be used to achieve arbitrary code execution on affected systems. Specially crafted files that leverage these parsers can be used to create conditions that could be leveraged by an attacker to obtain the ability to execute arbitrary code on affected systems.
Vulnerabilities discovered by Talos
Talos is disclosing multiple vulnerabilities discovered in the Aerospike Database Server. These vulnerabilities range from memory disclosure to potential remote code execution. This software is used by various companies that require a high performance NoSQL database. Aerospike fixed these issues in version 3.11.
The Aerospike Database Server is both a distributed and scalable NoSQL database that is used as a back-end for scalable web applications that need a key-value store. With a focus on performance, it is multi-threaded and retains its indexes entirely in ram with the ability to persist data to a solid-state drive or traditional rotational media.
TALOS-2016-0264 (CVE-2016-9050) – Aerospike Database Server Client Message Memory Disclosure Vulnerability
TALOS-2016-0266 (CVE-2016-9052) – Aerospike Database Server Index Name Code Execution Vulnerability
TALOS-2016-0268 (CVE-2016-9054) – Aerospike Database Server Set Name Code Execution Vulnerability
Happy New Year to our readers! Today marks the first Patch Tuesday of 2017 with Microsoft releasing their monthly set of bulletins designed to address security vulnerabilities. This month’s release is relatively light with 4 bulletins addressing 3 vulnerabilities. Two bulletins are rated critical and address vulnerabilities in Office and Adobe Flash Player while the other two are rated important and address vulnerabilities Edge and the Local Security Authority Subsystem Service.
Bulletins Rated Critical
Microsoft bulletins MS17-002 and MS17-003 are rated critical.
MS17-002 addresses CVE-2017-0003, an arbitrary code execution vulnerability in Microsoft Office 2016. Specifically, Microsoft Word 2016 and Microsoft SharePoint Enterprise Server 2016 are affected. This vulnerability manifests in the way Office handles objects in memory. Exploitation of this flaw is achievable if, for example, a user opens a specifically crafted Word document received via email or downloaded from a site hosting a specifically crafted document.