Multiple security issues were found in libsass. CVE-2017-11554 There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service. https://bugzilla.redhat.com/show_bug.cgi?id=1471780 https://github.com/sass/libsass/issues/2445 CVE-2017-11555 There is an illegal address access in the Eval::operator function in eval.cpp in LibSass 3.4.5. A crafted input will lead to a remote denial of service. https://bugzilla.redhat.com/show_bug.cgi?id=1471782 CVE-2017-11556 There is a stack consumption vulnerability in the Parser::advanceToNextToken function in parser.cpp in LibSass 3.4.5. A crafted input may lead to remote denial of service. https://bugzilla.redhat.com/show_bug.cgi?id=1471786 CVE-2017-11605 There is a heap based buffer over-read in LibSass 3.4.5, related to address 0xb4803ea1. A crafted input will lead to a remote denial of service attack. https://bugzilla.redhat.com/show_bug.cgi?id=1474019
Created libsass tracking bugs for this issue: Affects: epel-7 [bug 1474938]
CVE-2017-11608 There is a heap-based buffer over-read in the Sass::Prelexer::re_linebreak function in lexer.cpp in LibSass 3.4.5. A crafted input will lead to a remote denial of service attack. https://bugzilla.redhat.com/show_bug.cgi?id=1474276
CVE-2017-12962 There are memory leaks in LibSass 3.4.5 triggered by deeply nested code, such as code with a long sequence of open parenthesis characters, leading to a remote denial of service attack. https://bugzilla.redhat.com/show_bug.cgi?id=1482331 CVE-2017-12963 There is an illegal address access in Sass::Eval::operator() in eval.cpp of LibSass 3.4.5, leading to a remote denial of service attack. NOTE: this is similar to CVE-2017-11555 but remains exploitable after the vendor's CVE-2017-11555 fix (available from GitHub after 2017-07-24). https://bugzilla.redhat.com/show_bug.cgi?id=1482335 CVE-2017-12964 There is a stack consumption issue in LibSass 3.4.5 that is triggered in the function Sass::Eval::operator() in eval.cpp. It will lead to a remote denial of service attack. https://bugzilla.redhat.com/show_bug.cgi?id=1482397