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Created attachment 1291519 [details]
Triggered by  "infotocp POC6"

Description of problem:

In the fmt_entry function  line 835, the sprintf function was called for copy some values related to input for the buffer that  exceeding  the length of MAX_TERMINFO_LENGTH + EXTRA_CAP bytes. The buffer out of bound written led to the return address of fmt_entry function was covered.

Version-Release number of selected component (if applicable):

<=6.0

How reproducible:

infotocap $POC

Steps to Reproduce:
1. gdb infotocap
2. set breakpoint for fmt_entry return address before calling sprintf and after calling sprintf
3. check the ret address be covered

Actual results:

the fmt_entry  ret address be covered
crash

Expected results:

the fmt_entry  ret address be covered
crash


Additional info:

Credits:

This vulnerability is detected by team OWL337, with our custom fuzzer coll AFL. Please contact ganshuitao  and chaoz.cn if you need more info about the team, the tool or the vulnerability.

This appears to be a duplicate, because once POC1-POC3 are addressed this is no longer reproducible.

*** This bug has been marked as a duplicate of bug 1464687 ***