bug#64229: closed (b2sum: heap-overflow in digest_check)

[GNU bug Tracking System]

Your message dated Thu, 22 Jun 2023 21:48:28 +0100
with message-id <11a8d10b-6e65-a36e-68c0-9198d845243e@draigBrady.com>
and subject line Re: bug#64229: b2sum: heap-overflow in digest_check
has caused the debbugs.gnu.org bug report #64229,
regarding b2sum: heap-overflow in digest_check
to be marked as done.

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64229: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64229
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> --- Begin Message ---
>
>
>
> Subject: 
>
> b2sum: heap-overflow in digest_check
>
>
>
>
> Date: 
>
> Thu, 22 Jun 2023 17:33:40 +0100
>
>
>
>
> Hi,
>
>
> KLEE reported a heap-overflow in b2sum (Coreutils 9.3). When running it
> with:
>
> $ printf '\n\n0A0BA0' | coreutils-9.3/bin/b2sum -c
>
> (even '0BA0' seems to work on my machine) ASAN confirms the issue:
>
> > #1  0x0000000000473de0 in __interceptor_strchr (s=<optimized out>, 
> > c=<optimized out>)
> > #2  0x0000000000500a81 in digest_check (checkfile_name=0x7fffffffe69e 
> > "stdin") at /tmp/src/coreutils-9.3/src/digest.c:1216
> > #3  0x00000000005005e9 in main (argc=3, argv=0x7fffffffe3a8) at 
> > /tmp/src/coreutils-9.3/src/digest.c:1607
>
>
> Best,
>
> Frank
>
>
>
> --- End Message ---

--- Begin Message --- Subject: Re: bug#64229: b2sum: heap-overflow in digest_check Date: Thu, 22 Jun 2023 21:48:28 +0100 User-agent: Mozilla Thunderbird

On 22/06/2023 17:33, Frank Busse wrote:

Hi,


KLEE reported a heap-overflow in b2sum (Coreutils 9.3). When running it
with:

$ printf '\n\n0A0BA0' | coreutils-9.3/bin/b2sum -c

(even '0BA0' seems to work on my machine) ASAN confirms the issue:

#1  0x0000000000473de0 in __interceptor_strchr (s=<optimized out>, c=<optimized 
out>)
#2  0x0000000000500a81 in digest_check (checkfile_name=0x7fffffffe69e "stdin") 
at /tmp/src/coreutils-9.3/src/digest.c:1216
#3  0x00000000005005e9 in main (argc=3, argv=0x7fffffffe3a8) at 
/tmp/src/coreutils-9.3/src/digest.c:1607

Nice one.
I'll push the attached later to fix this.

Marking this as done.

thanks,
Pádraig.

b2sum-uar-fix.patch
Description: Text Data

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