CVE-2016-15059

NameCVE-2016-15059
DescriptionNet::IDN::Punycode versions before 2.301 for Perl allow a heap buffer overflow via unchecked writes past the output buffer in encode_punycode. The XS backend builds the encoded label in the string buffer of the scalar it returns, sized from the input length. The loop that emits the digits of each code point checks for room before every write, but the write of the last digit of each round and the write of the terminating NUL do not, so an input whose encoded form fills the buffer writes past its end. Only the XS backend is affected. Encoding an attacker-supplied string corrupts the heap.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libnet-idn-encode-perl (PTS)bookworm2.500-3fixed
trixie2.500-5fixed
forky, sid2.502-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libnet-idn-encode-perlsource(unstable)2.303-1

Notes

https://lists.security.metacpan.org/cve-announce/msg/43753031/
https://rt.cpan.org/Ticket/Display.html?id=118924
Fixed by: https://github.com/robrwo/Net-IDN-Encode/commit/9a3ba07f15d22c0347eefee9625b012cbc803657 (Net-IDN-Encode-2.303)

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