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[tor-bugs] #11649 [Tor]: Memory leak when parsing broken microdescriptors
#11649: Memory leak when parsing broken microdescriptors
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Reporter: nickm | Owner:
Type: defect | Status: new
Priority: major | Milestone: Tor:
Component: Tor | 0.2.5.x-final
Keywords: tor-client 024-backport | Version:
023-backport memory-leak valgrind | Actual Points:
Parent ID: | Points:
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When we're parsing microdescriptors, we don't clear the dynamically
allocated part of the tokens after parsing. This can leak memory if the
microdescriptors are badly formed.
This can enable a comparatively slow denial of service (on the order of
several MB per MD download request made to a hostile source), and needs to
be patched.
Found as a needle in the haystack of #11618.
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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11649>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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