8000 segfault for malform <input> tag · Issue #7 · tats/w3m · GitHub
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kcwu opened this issue Aug 8, 2016 · 1 comment
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segfault for malform <input> tag #7

kcwu opened this issue Aug 8, 2016 · 1 comment

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@kcwu
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kcwu commented Aug 8, 2016

How to reproduce

$ echo '<input type=">">' |  ./w3m -T text/html -dump
segmentation fault (core dumped)

#0  0x000000000044f153 in formUpdateBuffer (a=0xe30000, buf=0xe22e00, form=0xe2ff80) at form.c:458
458                 p = form->value->ptr;
(gdb) p form
$1 = (FormItemList *) 0xe2ff80
(gdb) p form->value
$2 = (Str) 0x0
(gdb) bt
#0  0x000000000044f153 in formUpdateBuffer (a=0xe30000, buf=0xe22e00, form=0xe2ff80) at form.c:458
#1  0x000000000044e9cc in formResetBuffer (buf=0xe22e00, formitem=0xe210e0) at form.c:268
#2  0x000000000042c54e in loadHTMLBuffer (f=0x7ffca7a4db90, newBuf=0xe22e00) at file.c:6750
#3  0x000000000042ec9b in openGeneralPagerBuffer (stream=0xdbf1b0) at file.c:7765
#4  0x0000000000406bcd in main (argc=4, argv=0x7ffca7a4ddb8, envp=0x7ffca7a4dde0) at main.c:923

This is found by afl-fuzz.
tats added a commit that referenced this issue Aug 8, 2016
@tats
Prevent segfault with malformed input type
59b91cd 
Bug-Debian: #7
@tats
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tats commented Aug 8, 2016

Fixed, thank you.

@tats tats closed this as completed Aug 8, 2016
@kcwu kcwu mentioned this issue Dec 14, 2016
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tats added a commit that referenced this issue Dec 18, 2016
@tats
Prevent segfault with malformed input type
f92e9ed 
Bug-Debian: #7 [CVE-2016-9430]
Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=59b91cd8e30c86f23476fa81ae005cabff49ebb6
@rkta rkta mentioned this issue Oct 17, 2021
Closed
@cx104906 cx104906 mentioned this issue Sep 11, 2024
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