[Bug network/22333] New: out of bounds stack read in libidn (CVE-2016-6261) unpatched in libc

["dilfridge at gentoo dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22333

            Bug ID: 22333
           Summary: out of bounds stack read in libidn (CVE-2016-6261)
                    unpatched in libc
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: network
          Assignee: unassigned at sourceware dot org
          Reporter: dilfridge at gentoo dot org
  Target Milestone: ---

The idna_to_ascii_4i function in lib/idna.c in libidn before 1.33 allows
context-dependent attackers to cause a denial of service (out-of-bounds read
and crash) via 64 bytes of input.

CVE:
https://nvd.nist.gov/vuln/detail/CVE-2016-6261

libidn upstream fix:
http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=f20ce1128fb7f4d33297eee307dddaf0f92ac72d

The patch applies cleanly.

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