ext/zip: don't use gl_pathc after call to globfree (#79424) #5311
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Am I reading right that this is not a use-after-free in the classical sense (i.e. it would not show up in valgrind / asan), and as such we also don't need to treat this as a security issue? |
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I'm not a security researcher so I'm not sure, I just wanted to fix this so that |
nikic
approved these changes
Mar 27, 2020
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Thanks for the context. For reference, the musl implementation: https://github.com/bminor/musl/blob/d0b547dfb5f7678cab6bc39dd736ed6454357ca4/src/regex/glob.c#L300
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cc @remicollet |
remicollet
approved these changes
Mar 28, 2020
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@sroracle could you please open a bug, so it can be linked in changelog ? |
maxcrees
changed the title
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Opened as #79424. Added an entry to NEWS and adjusted the commit message as appropriate. |
This breaks on Linux with the musl libc, since it zeroes out gl_pathc during globfree.
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Thanks a lot, Amended and applied in 7.3+ |
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This was introduced by b734bf4 ("- sync with PECL HEAD"), so 7.2, 7.3, 7.4, and master are affected. I based it against 7.3 per the CONTRIBUTING recommendations.
However, there is still a minor problem here - there is a discrepancy between the types of
globbuf.gl_pathc(size_t) and the return value ofphp_zip_glob(int). I wasn't sure how best to correct this so I leave that to the maintainers.