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Segfault in examples/dns on a malformed DNS packet #198

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pictyeye opened this issue Apr 2, 2021 · 0 comments
Open

Segfault in examples/dns on a malformed DNS packet #198

pictyeye opened this issue Apr 2, 2021 · 0 comments

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@pictyeye
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pictyeye commented Apr 2, 2021

The attached packet (found using AFL) triggers a segmentation fault in act_domain (dns.c): segfaulter.txt (NB: I had to base64 encode the packet to submit the issue on GH)

To reproduce the bug, you must first run the dns server using

scons examples
build/opt/examples/dns

Then, you can trigger the segfault using

openssl enc -d -base64 < segfaulter.txt | nc localhost 53
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@pictyeye