CVE-2016-15059 Affecting libnet-idn-encode-perl package, versions <2.303-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2016-15059 (opens in a new tab)How to fix?
Upgrade Echo:latest libnet-idn-encode-perl to version 2.303-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libnet-idn-encode-perl package and not the libnet-idn-encode-perl package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Net::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.
References
- https://advisory.echohq.com/cve/CVE-2016-15059
- https://github.com/robrwo/Net-IDN-Encode/commit/9a3ba07f15d22c0347eefee9625b012cbc803657.patch
- https://metacpan.org/release/CFAERBER/Net-IDN-Encode-2.301/changes
- https://rt.cpan.org/Ticket/Display.html?id=118924
- http://www.openwall.com/lists/oss-security/2026/09/22/10