Date: Sun, 19 Apr 2015 10:11:58 -0700 From: Reed Loden <reed@...dloden.com> To: oss-security@...ts.openwall.com, Assign a CVE Identifier <cve-assign@...re.org> Subject: libxml2 issue: out-of-bounds memory access when parsing an unclosed HTML comment (saw this randomly today on Twitter, so figured I'd send it on to make sure it gets a CVE and actually gets fixed) https://hackerone.com/reports/57125#activity-384861 """ This is an out-of-bounds memory access in libxml2. By entering a unclosed html comment such as <!-- the libxml2 parser didn't stop parsing at the end of the buffer, causing random memory to be included in the parsed comment that was returned to ruby. In Shopify, this caused ruby objects from previous http requests to be disclosed in the rendered page. Link to the issue in libxml2's bugtracker: https://bugzilla.gnome.org/show_bug.cgi?id=746048 A patched version of nokogiri (which uses a embedded libxml2) is available here: https://github.com/Shopify/nokogiri/compare/1b1fcad8bd64ab70256666c38d2c998e86ade8c0...master This bug is still not patched upstream, but both libxml2 and nokogiri developers are aware of the issue. """ ~reed
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