Bug 1928437 - There is an illegal WRITE memory access at libcaca/caca/canvas.c:475 (function:caca_resize)in libcaca latest version.
Summary: There is an illegal WRITE memory access at libcaca/caca/canvas.c:475 (functio...
Alias: None
Product: Fedora
Classification: Fedora
Component: libcaca
Version: 32
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Matthias Saou
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2021-02-14 01:58 UTC by 245
Modified: 2021-05-25 17:05 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: ---
Doc Text:
Clone Of:
Last Closed: 2021-05-25 17:05:41 UTC
Type: Bug

Attachments (Terms of Use)
The report contains verification steps and POC (4.33 KB, text/plain)
2021-02-14 01:58 UTC, 245
no flags Details

Description 245 2021-02-14 01:58:52 UTC
Created attachment 1756895 [details]
The report contains verification steps and POC

Description of problem:

Use a specific string to call caca_import_canvas_from_memory() the program will crash

Version-Release number of selected component (if applicable):
libcaca - v0.99.beta19

How reproducible:

Steps to Reproduce:
1.Get the source code of libcaca:

2.Compile the libcaca.so library:

$ cd libcaca
$ apt-get install automake libtool pkg-config -y
$ ./bootstrap
$ ./configure
$ make
3.Copy the POC.c & POC_build.sh in /example folder

4.Run POC_build.sh to compile POC.c

5Run POC

Actual results:
==20599==ERROR: AddressSanitizer: SEGV on unknown address 0x601f1009f400 (pc 0x7fd5a381ff76 bp 0x7ffdb2f550d0 sp 0x7ffdb2f54e40 T0)
==20599==The signal is caused by a WRITE memory access.
#0 0x7fd5a381ff75 in caca_resize /work/libcaca/caca/canvas.c:475:47
#1 0x7fd5a384fdc3 in _import_ansi /work/libcaca/caca/codec/text.c:451:17
#2 0x4f921c in main /work/libcaca/examples/POC.c:43:6
#3 0x7fd5a34840b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#4 0x41e34d in _start (/work/libcaca/examples/POC+0x41e34d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /work/2_libfuzzer_Assignment/question3/libcaca/caca/canvas.c:475:47 in caca_resize

Expected results:

Additional info:

Comment 1 245 2021-02-14 02:08:52 UTC
Reported to upstream https://github.com/cacalabs/libcaca/issues/52

Comment 2 Fedora Program Management 2021-04-29 16:46:08 UTC
This message is a reminder that Fedora 32 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora 32 on 2021-05-25.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
Fedora 'version' of '32'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not 
able to fix it before Fedora 32 is end of life. If you would still like 
to see this bug fixed and are able to reproduce it against a later version 
of Fedora, you are encouraged  change the 'version' to a later Fedora 
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's 
lifetime, sometimes those efforts are overtaken by events. Often a 
more recent Fedora release includes newer upstream software that fixes 
bugs or makes them obsolete.

Comment 3 Ben Cotton 2021-05-25 17:05:41 UTC
Fedora 32 changed to end-of-life (EOL) status on 2021-05-25. Fedora 32 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
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