glibc: denial of service
| Package(s): | glibc | CVE #(s): | CVE-2016-6323 | ||||||||||||||||||||
| Created: | August 22, 2016 | Updated: | October 20, 2016 | ||||||||||||||||||||
| Description: | From the glibc bugzilla entry:
Since [__startcontext] transfers to a different stack it should be marked .cantunwind, so that the EABI unwinder does not try to unwind past it. This can cause _Unwind_Backtrace (used by backtrace_full in libbacktrace) to infloop. also from Florian Weimer on oss-security: Andreas Schwab of SuSE reported and fixed a glibc bug where the makecontext function would create an execution context which is incompatible with the unwinder, causing it to hang when the generation of a backtrace is attempted: | ||||||||||||||||||||||
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