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tcpdf {old,}stable security update (was: PHP ReDoS question)



Hello William, hello all,

This is just a quick heads-up about my on-going work to prepare a
security update for tcpdf, and to avoid any double-work.

Among the currently open CVEs [tcpdf], the most complex backport seems
to be CVE-2024-32489, since among the two referenced commits, the only
one that is actually part of the released code is a "squash [of]
multiple fixes" [82fc97b]. My plan is to isolate the changes relevant to
the fix.

[tcpdf] https://security-tracker.debian.org/tracker/source-package/tcpdf
[CVE-2024-32489] https://security-tracker.debian.org/tracker/CVE-2024-32489
[82fc97b] https://github.com/tecnickcom/TCPDF/commit/82fc97bf1c74c8dbe62b1d3cc6d10fa4b87e0262

Please, if you have any thoughts, questions, comments, ... don't
hesitate to speak up.

Other than that, there is no PoC publicly available for most of the
CVEs, and I still need to see how difficult is to test those.

Cheers,

 -- Santiago

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