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Message-ID: <20260403040124.GP1827@brightrain.aerifal.cx>
Date: Fri, 3 Apr 2026 00:01:25 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: iconv GB18030 DoS issue
On Thu, Apr 02, 2026 at 11:43:30PM -0400, Rich Felker wrote:
> An issue has been reported in musl libc's iconv decoder for GB18030
> (Chinese) character encoding, whereby performance for decoding certain
> characters is pathologically bad, allowing DoS in processes handling
> untrusted data in this encoding or with encoding declared by the
> input.
>
> The researcher who found the bug, Jens Jarl Nestén Hansen-Nord, has
> applied for a CVE but it has not yet been assigned:
> https://www.openwall.com/lists/oss-security/2026/04/02/10
>
> I will follow up with the CVE id once that happens.
>
> The attached patch provides a fix. It can also be obtained from git,
> via a checkout or the web-based cgit interface:
> https://git.musl-libc.org/cgit/musl/patch/?id=67219f0130ec7c876ac0b299046460fad31caabf
Missing attachment now here:
View attachment "0001-fix-pathological-slowness-incorrect-mappings-in-icon.patch" of type "text/plain" (7502 bytes)
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