Bug 1649198
| Summary: | There is a heap-buffer-overflow at stb_image.h:5580(function:stbi__tga_load) in libsixel latest version that will cause serious impact. | ||||||
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| Product: | [Other] Security Response | Reporter: | shuitao gan <ganshuitao> | ||||
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> | ||||
| Status: | CLOSED NOTABUG | QA Contact: | |||||
| Severity: | urgent | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | unspecified | ||||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2018-11-13 14:45:18 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Hello, Red Hat does not ship libsixel in any of our supported products. Please, report these issues upstream at: https://github.com/saitoha/libsixel/issues Thanks! |
Created attachment 1505139 [details] ./img2sixel POC0 version: libsixel latest version(v1.8.2) Summary: There is a heap-buffer-overflow at stb_image.h:5580(function:stbi__tga_load) in libsixel latest version that will cause serious impact. Description: The asan debug is as follows: $./img2sixel POC0 ================================================================= ==591==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000a7d1 at pc 0x7f74dd362189 bp 0x7ffc2a510f90 sp 0x7ffc2a510f80 READ of size 1 at 0x60200000a7d1 thread T0 #0 0x7f74dd362188 in stbi__tga_load /home/company/real_sanitize/libsixel-master/src/stb_image.h:5580 #1 0x7f74dd362188 in stbi__load_main /home/company/real_sanitize/libsixel-master/src/stb_image.h:1011 #2 0x7f74dd368115 in stbi__load_and_postprocess_8bit /home/company/real_sanitize/libsixel-master/src/stb_image.h:1090 #3 0x7f74dd36974f in load_with_builtin /home/company/real_sanitize/libsixel-master/src/loader.c:882 #4 0x7f74dd36d3d9 in sixel_helper_load_image_file /home/company/real_sanitize/libsixel-master/src/loader.c:1352 #5 0x7f74dd378283 in sixel_encoder_encode /home/company/real_sanitize/libsixel-master/src/encoder.c:1737 #6 0x4017f8 in main /home/company/real_sanitize/libsixel-master/converters/img2sixel.c:457 #7 0x7f74dcd31a3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f) #8 0x401918 in _start (/home/company/real_sanitize/poc_check/libsixel/img2sixel+0x401918) 0x60200000a7d1 is located 0 bytes to the right of 1-byte region [0x60200000a7d0,0x60200000a7d1) allocated by thread T0 here: #0 0x7f74dd65e9aa in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x989aa) #1 0x7f74dd362264 in stbi__tga_load /home/company/real_sanitize/libsixel-master/src/stb_image.h:5527 #2 0x7f74dd362264 in stbi__load_main /home/company/real_sanitize/libsixel-master/src/stb_image.h:1011 SUMMARY: AddressSanitizer: heap-buffer-overflow /home/company/real_sanitize/libsixel-master/src/stb_image.h:5580 stbi__tga_load Shadow bytes around the buggy address: 0x0c047fff94a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff94b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff94c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff94d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff94e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c047fff94f0: fa fa fa fa fa fa fa fa fa fa[01]fa fa fa fd fd 0x0c047fff9500: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff9510: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff9520: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff9530: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd 0x0c047fff9540: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe ==591==ABORTING