| Name | CVE-2018-5743 |
| Description | By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743. |
| 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-1859-1, DSA-4440-1, ELA-148-1 |
| Debian Bugs | 927932 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bind9 (PTS) | jessie, jessie (lts) | 1:9.9.5.dfsg-9+deb8u31 | fixed |
| stretch (security) | 1:9.10.3.dfsg.P4-12.3+deb9u12 | fixed | |
| stretch (lts), stretch | 1:9.10.3.dfsg.P4-12.3+deb9u17 | fixed | |
| buster, buster (lts) | 1:9.11.5.P4+dfsg-5.1+deb10u13 | fixed | |
| buster (security) | 1:9.11.5.P4+dfsg-5.1+deb10u11 | fixed | |
| bullseye | 1:9.16.50-1~deb11u2 | fixed | |
| bullseye (security) | 1:9.16.50-1~deb11u1 | fixed | |
| bookworm (security), bookworm | 1:9.18.28-1~deb12u2 | fixed | |
| trixie | 1:9.20.4-2 | fixed | |
| sid | 1:9.20.4-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bind9 | source | wheezy | 1:9.8.4.dfsg.P1-6+nmu2+deb7u23 | ELA-148-1 | ||
| bind9 | source | jessie | 1:9.9.5.dfsg-9+deb8u18 | DLA-1859-1 | ||
| bind9 | source | stretch | 1:9.10.3.dfsg.P4-12.3+deb9u5 | DSA-4440-1 | ||
| bind9 | source | (unstable) | 1:9.11.5.P4+dfsg-4 | 927932 |
https://kb.isc.org/docs/cve-2018-5743
https://gitlab.isc.org/isc-projects/bind9/commit/9689ffc485df8f971f0ad81ab8ab1f5389493776
https://gitlab.isc.org/isc-projects/bind9/commit/55a7a458e30e47874d34bdf1079eb863a0512396
https://gitlab.isc.org/isc-projects/bind9/commit/9446629b730c59c4215f08d37fbaf810282fbccb
https://gitlab.isc.org/isc-projects/bind9/commit/87d431161450777ea093821212abfb52d51b36e3
https://gitlab.isc.org/isc-projects/bind9/commit/13f7c918b8720d890408f678bd73c20e634539d9
https://gitlab.isc.org/isc-projects/bind9/commit/d01023aaac35543daffbdf48464e320150235d41
Additionally: https://lists.isc.org/pipermail/bind-users/2019-April/101673.html
https://gitlab.isc.org/isc-projects/bind9/merge_requests/1864.patch