![]() ![]() ![]() Refer to the documentation onĮrror handling. Why are some functions returning SPNG_EBADSTATE? ¶Ī previous function call encountered an irrecoverable error, most decodingĮrrors are not recoverable. AddressSanitizer: heap-buffer-overflow /libpng/pngrutil.c:3985:31 in pngreadfilterrowavg Shadow bytes around the buggy address: 0x0c0c7fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00. if ab>max, then a>max/b (max is R-1 if unsigned and R/2-1 if signed). Integer overflow in pngreadpng (pngread.c) A PNG with excessive height may. In libpng 1.6.34, a wrong calculation of rowfactor in the pngcheckchunklength function (pngrutil. Libspng is threadsafe as long as contexts are not shared across threads. An integer overflow happened in pngreadpng->.->pngreadfilterrowavg 457. Multiplication overflow: There are two ways to detect an overflow: 1. libPNG 1.2.5 stack-based buffer overflow and other code concerns. Images exceeding 4GB per row are not decoded, there are no other limits,Īt worst it will run out of memory or fail an integer overflow check,Īll errors are handled gracefully. Mac OS X 10.3. Will it be drop-in compatible with libpng? ¶Ĭonsidered but it would need a lot of features implemented outside of libspng. This is a typical scenario in integer overflow issues and it usually leads to other vulnerabilities, such as heap overflows, if later in the code the original. Source code changes report for the member file png.c of the libpng software package between the versions 1.6.39 and 1.6. Output format and flag combinations and compared against libpng for correctness. The test suite consists of over 1000 test cases,ġ75 test images are decoded with all possible Releases are scanned with Clang Static Analyzer, PVS-Studio, and Coverity Scan. The library is continuously fuzzed by OSS-Fuzz, * Create a context */ spng_ctx * ctx = spng_ctx_new ( 0 ) /* Set an input buffer */ spng_set_png_buffer ( ctx, buf, buf_size ) /* Determine output image size */ spng_decoded_image_size ( ctx, SPNG_FMT_RGBA8, & out_size ) /* Decode to 8-bit RGBA */ spng_decode_image ( ctx, out, out_size, SPNG_FMT_RGBA8, 0 ) /* Free context memory */ spng_ctx_free ( ctx ) Ĭode is written according to the rules of theĪll integer arithmetic is checked for overflow and all error conditions are handled gracefully. Mac OS X 10.3.5 is now available and delivers security enhancements for the following components: Component: libpng (Portable Network Graphics) CVE-IDs: CAN-2002-1363, CAN-2004-0421, CAN-2004-0597, CAN-2004-0598, CAN-2004-0599 Impact: Malicious png images can cause application crashes and could execute arbitrary code Description: A number of.
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