The next article is an invitee weblog post from an external researcher (i.e. the writer is non a or Google researcher). This post is most a Chrome OS exploit I reported to Chrome VRP inward September. The folks were squeamish to allow me do a invitee post most it, therefore hither goes. The study includes a detailed writeup , therefore this post volition have got less detail. 1 byte overflow inward a DNS library In Apr I constitute a TCP port listening on localhost inward Chrome OS. It was an HTTP proxy built into shill, the Chrome OS network manager. The proxy has at nowadays been removed equally component of a fix, but its source tin give notice nonetheless move seen from an one-time revision: shill/http_proxy.cc . The code is unproblematic in addition to doesn’t seem to incorporate whatever obvious exploitable bugs, although it is real liberal inward what it accepts equally incoming HTTP. It calls into the c-ares library for resolving DNS. There was a possible 1 byte ov...
Posted yesteryear Gal Beniamini, Traditionally, the operating system’s total is the concluding security boundary standing betwixt an assaulter together with total command over a target system. As such, additional aid must hold upwards taken inwards lodge to ensure the integrity of the kernel. First, when a organization boots, the integrity of its primal components, including that of the operating system’s kernel, must hold upwards verified. This is achieved on Android yesteryear the verified kicking chain . However, only booting an authenticated total is insufficient—what most maintaining the integrity of the total spell the organization is executing? Imagine a scenario where an assaulter is able to abide by together with exploit a vulnerability inwards the operating system’s kernel. Using such a vulnerability, the assaulter may endeavor to subvert the integrity of the total itself, either yesteryear modifying the contents of its code, or yesteryear introducing novel attacker-co...