| Name | CVE-2016-6261 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-582-1, DSA-3658-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libidn (PTS) | jessie, jessie (lts) | 1.29-1+deb8u3 | fixed |
| stretch | 1.33-1+deb9u1 | fixed |
| buster | 1.33-2.2 | fixed |
| bullseye | 1.33-3 | fixed |
| bookworm | 1.41-1 | fixed |
| sid, trixie | 1.42-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://lists.gnu.org/archive/html/help-libidn/2016-07/msg00009.html
Test: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=9a1a7e15d0706634971364493fbb06e77e74726c (libidn-1-33)
Fix: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=f20ce1128fb7f4d33297eee307dddaf0f92ac72d (libidn-1-33)
Follow-up memory leak fix: http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=11abd0e02c16f9e0b6944aea4ef0f2df44b42dd4 (libidn-1-33)
https://www.openwall.com/lists/oss-security/2016/07/20/6