| Name | CVE-2020-10188 |
| Description | utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
| References | DLA-2176-1, DLA-2341-1 |
| Debian Bugs | 953477, 953478, 956084 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| inetutils (PTS) | buster | 2:1.9.4-7+deb10u1 | fixed |
| buster (security) | 2:1.9.4-7+deb10u2 | fixed | |
| bullseye | 2:2.0-1+deb11u1 | fixed | |
| bookworm, sid | 2:2.4-2 | fixed | |
| netkit-telnet (PTS) | buster | 0.17-41.2 | fixed |
| bullseye | 0.17-42 | fixed | |
| netkit-telnet-ssl (PTS) | bullseye | 0.17.41+0.2-3.3 | fixed |
| bookworm | 0.17.41+really0.17-3 | fixed | |
| sid | 0.17.41+really0.17-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| inetutils | source | jessie | 2:1.9.2.39.3a460-3+deb8u1 | DLA-2176-1 | ||
| inetutils | source | stretch | 2:1.9.4-2+deb9u1 | DLA-2341-1 | ||
| inetutils | source | buster | 2:1.9.4-7+deb10u1 | |||
| inetutils | source | (unstable) | 2:1.9.4-12 | 956084 | ||
| netkit-telnet | source | (unstable) | 0.17-18woody2 | 953477 | ||
| netkit-telnet-ssl | source | (unstable) | 0.17.17+0.1-2woody3 | 953478 |
https://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.html
https://github.com/marado/netkit-telnet-ssl/issues/5
https://lists.gnu.org/archive/html/bug-inetutils/2020-04/msg00010.html
Patch in Fedora: https://src.fedoraproject.org/rpms/telnet/raw/master/f/telnet-0.17-overflow-exploit.patch