CVE-2016-15059 Net::IDN::Punycode versions before 2.301 for Perl allow a heap buffer overflow via unchecked writes past the output buffer in encode_punycode
CriticalCVSS 9.8
EPSS 0.42%
- Published
- Updated
- Exploit status
- No public exploit known
Description
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/libnet-idn-encode-perl(Debian:12) | < 2.303-1 | 2.303-1 |
| debian/libnet-idn-encode-perl(Debian:13) | < 2.303-1 | 2.303-1 |
| debian/libnet-idn-encode-perl(Debian:14) | < 2.303-1 | 2.303-1 |
| cpan Net-IDN-Encode | < 2.301 | 2.301 |
References
- Debian Security Tracker CVE-2016-15059 vendor-advisory
- Red Hat CVE page vendor-advisory
- Red Hat Bugzilla 2538644 issue-tracking
- www.cve.org
- nvd.nist.gov
- www.openwall.com
- github.com patch
- metacpan.org release-notes
- rt.cpan.org issue-tracking