CVE-2016-7069
Description
An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2016-7069 NameCVE-2016-7069 DescriptionAn issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer…
CVE-2016-7069
| Name | CVE-2016-7069 |
| Description | An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 872854 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| dnsdist (PTS) | bullseye | 1.5.1-3 | fixed |
| bookworm | 1.7.3-2 | fixed | |
| trixie (security), trixie | 1.9.14-0+deb13u1 | fixed | |
| forky | 2.0.5-1 | fixed | |
| sid | 2.0.5-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| dnsdist | source | stretch | 1.1.0-2+deb9u1 | |||
| dnsdist | source | (unstable) | 1.2.0-1 | low | 872854 |
Notes
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html
Patches: https://downloads.powerdns.com/patches/2017-01
Apply commands
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.htmlPatches: https://downloads.powerdns.com/patches/2017-01OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1.2.0-1 |
| debian | bullseye | fixed | 1.2.0-1 |
| debian | forky | fixed | 1.2.0-1 |
| debian | sid | fixed | 1.2.0-1 |
| debian | trixie | fixed | 1.2.0-1 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.