CVE-2019-7308

CVE-2019-7308 affects the Linux kernel’s BPF verifier in kernel/bpf/verifier.c prior to 4.20.6. The issue is undesirable out-of-bounds speculation on pointer arithmetic across branches with different state/limits, enabling potential side-channel attacks. Public sources in connected documents cons...

CVE-2019-7308

kernel/bpf/verifier.c in the Linux kernel before 4.20.6 performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks...

CVE-2019-7308: Undefined Security Weakness

kernel/bpf/verifier.c in the Linux kernel before 4.20.6 performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks...

Information Disclosure

Microsoft.ChakraCore is vulnerable to information disclosure attacks. The vulnerability exists due to the lack of guards for speculation on non-JIT operations, causing informatino disclosure attacks...

Unbreakable Enterprise kernel security update

kernel-uek 3.8.13-118.24.2 - x86/speculation/l1tf: Fix overflow in l1tfpfnlimit on 32bit Vlastimil Babka Orabug: 28505476 CVE-2018-3620 - x86/speculation/l1tf: Protect PAE swap entries against L1TF Vlastimil Babka Orabug: 28505476 CVE-2018-3620 - x86/speculation/l1tf: Extend 64bit swap file size...

Unbreakable Enterprise kernel security update

4.1.12-124.19.1 - x86/entry/64: Ensure %ebx handling correct in xenfailsafecallback George Kennedy Orabug: 28402927 CVE-2018-14678 - x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+ Andi Kleen Orabug: 28488808 CVE-2018-3620 - x86/speculation/l1tf: Suggest what to do on systems with t...

Kernel: hw: cpu: L1 terminal fault (L1TF)

Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of...

hw: cpu: speculative store bypass

An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions a commonly used performance optimization. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended Update Support, and Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impac...

kernel security and bug fix update

2.6.32-754.2.1.OL6 - Update genkey bug 25599697 2.6.32-754.2.1 - x86 entry/64: Don't use IST entry for BP stack Waiman Long 1596113 CVE-2018-10872 - fs gfs2: Flush delayed work earlier in gfs2inodelookup Andreas Grunbacher 1506281 - mm mempolicy: fix use after free when calling getmempolicy Augus...

OracleVM 3.4 : Unbreakable / etc (OVMSA-2018-0223) (Spectre)

The remote OracleVM system is missing necessary patches to address critical security updates : - KVM: SVM: Move spec control call after restore of GS Thomas Gleixner CVE-2018-3639 - x86/bugs: Fix the parameters alignment and missing void Konrad Rzeszutek Wilk CVE-2018-3639 - x86/bugs: Make...

AMD / ARM / Intel - Speculative Execution Variant 4 Speculative Store Bypass Exploit

Exploit for hardware platform in category dos / poc / ======== Intro / Overview ======== After Michael Schwarz made some interesting observations, we started looking into variants other than the three already-known ones. I noticed that Intel's Optimization Manual says in section 2.4.4.5 "Memory...

AMD / ARM / Intel - Speculative Execution Variant 4 Speculative Store Bypass

/ ======== Intro / Overview ======== After Michael Schwarz made some interesting observations, we started looking into variants other than the three already-known ones. I noticed that Intel's Optimization Manual says in section 2.4.4.5 "Memory Disambiguation": A load instruction micro-op may depe...

Unbreakable Enterprise kernel security update

4.1.12-124.15.2 - KVM: SVM: Move spec control call after restore of GS Thomas Gleixner CVE-2018-3639 - x86/bugs: Fix the parameters alignment and missing void Konrad Rzeszutek Wilk CVE-2018-3639 - x86/bugs: Make cpushowcommon static Jiri Kosina CVE-2018-3639 - x86/bugs: Fix ssbselectmitigation...

Reverse Engineering the Cuban Sonic Weapon

Interesting analysis and speculation...

USN-3561-1 libvirt update

It was discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This...

Russian Hacking Tools Codenamed WhiteBear Exposed

Kaspersky Labs exposed a highly sophisticated set of hacking tools from Russia called WhiteBear. From February to September 2016, WhiteBear activity was narrowly focused on embassies and consular operations around the world. All of these early WhiteBear targets were related to embassies and...

ShadowBrokers Remain an Enigma

LAS VEGAS—Clarity and the ShadowBrokers are strange bedfellows. We’re closing in on the first anniversary of the mysterious group’s initial dump of NSA hacking tools and we’re still no closer to understanding who they are, where they got their stuff, and what their true motivations are. Instead a...

Samy Kamkar's ProxyGambit Picks Up for Defunct ProxyHam

Without fail in the weeks leading up to Black Hat and DEF CON, there are inevitably talks that are either pulled by organizers, cancelled by presenters, or strong suggestions are made that the talks don’t happen. This year’s first casualty, Ben Caudill’s scheduled DEF CON demonstration of ProxyHa...

US Government: North Korea Behind Sony Hack

The United States government is expected to attribute the damaging and embarrassing hack of Sony Pictures Entertainment to the government of North Korea. Various mainstream media outlets quoting anonymous government sources said North Korea is “centrally involved” in the attack, which NBC News sa...