Description
The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | c-ares | 1.12.0-4 | — |
| Debian 13 | c-ares | 1.12.0-4 | — |
| Debian 12 | c-ares | 1.12.0-4 | — |
| Debian 7 | c-ares | 1.9.1-3+deb7u2 | DLA-998-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | c-ares | 1.10.0-3ubuntu0.2 | USN-3395-1 |
| Ubuntu 14.04 LTS | c-ares | 1.10.0-2ubuntu0.2 | USN-3395-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | nodejs | 8.10.0~dfsg-2ubuntu0.4+esm1 | USN-4796-1 |
| Ubuntu Pro 16.04 LTS | nodejs | 4.2.6~dfsg-1ubuntu4.2+esm1 | USN-4796-1 |
| Ubuntu Pro 14.04 LTS | nodejs | 0.10.25~dfsg2-2ubuntu1.2+esm1 | USN-4796-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 2 | rh-nodejs6-nodejs +2 | 6.11.3-2.el6 | RHSA-2017:2908 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | libcares2 | 1.9.1-8.1 | SUSE-SU-2017:1792-1 |
| SLES 12 | nodejs-common | 1.0-2.1 | SUSE-SU-2017:2168-1 |
| SLES 12 | nodejs4 | 4.8.4-15.5.1 | SUSE-SU-2017:2168-1 |
| SLES 12 | nodejs6 | 6.11.1-11.5.1 | SUSE-SU-2017:2168-1 |
| SLES 11 SP4 | MozillaFirefox | 68.2.0-78.51.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 68-21.9.8 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-atk | 2.26.1-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-cairo | 1.15.10-2.13.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gdk-pixbuf | 2.36.11-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-glib2 | 2.54.3-2.14.7 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gtk3 | 3.10.9-2.15.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-harfbuzz | 1.7.5-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi | 3.2.1.git259-2.3.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi-gcc5 | 5.3.1+r233831-14.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-pango | 1.40.14-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nspr | 4.21-29.6.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nss | 3.45-38.9.3 | SUSE-SU-2019:14246-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | libcares2 | 1.9.1-8.1 | SUSE-SU-2017:1792-1 |
| SUSE OpenStack Cloud 7 | nodejs-common | 1.0-2.1 | SUSE-SU-2017:2168-1 |
| SUSE OpenStack Cloud 7 | nodejs6 | 6.11.1-11.5.1 | SUSE-SU-2017:2168-1 |
| SUSE Enterprise Storage 4 | nodejs-common | 1.0-2.1 | SUSE-SU-2017:2168-1 |
| SUSE Enterprise Storage 4 | nodejs4 | 4.8.4-15.5.1 | SUSE-SU-2017:2168-1 |
| SUSE Enterprise Storage 4 | nodejs6 | 6.11.1-11.5.1 | SUSE-SU-2017:2168-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | c-ares | 1.17.2-2.2 | openSUSE-SU-2024:10668-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nodejs | 6.11.1-r0 | — |
| Alpine v3.23 | nodejs | 6.11.1-r0 | — |
| Alpine v3.22 | nodejs | 6.11.1-r0 | — |
| Alpine v3.21 | nodejs | 6.11.1-r0 | — |
| Alpine v3.20 | nodejs | 6.11.1-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nodejs | 6.11.1-r0 | — |
| Alpine v3.18 | nodejs | 6.11.1-r0 | — |
| Alpine v3.17 | nodejs | 6.11.1-r0 | — |
| Alpine v3.16 | nodejs | 6.11.1-r0 | — |
| Alpine v3.15 | nodejs | 6.11.1-r0 | — |
| Alpine v3.14 | nodejs | 6.11.1-r0 | — |
| Alpine v3.13 | nodejs | 6.11.1-r0 | — |
| Alpine v3.12 | nodejs | 6.11.1-r0 | — |
| Alpine v3.11 | nodejs | 6.11.1-r0 | — |
| Alpine v3.10 | nodejs | 6.11.1-r0 | — |
| Alpine v3.9 | nodejs | 6.11.1-r0 | — |
| Alpine v3.8 | nodejs | 6.11.1-r0 | — |
| Alpine v3.7 | nodejs | 6.11.1-r0 | — |
| Alpine v3.6 | c-ares | 1.12.0-r1 | — |
| Alpine v3.6 | nodejs | 6.10.3-r1 | — |
| Alpine v3.6 | nodejs-current | 7.10.1-r0 | — |
| Alpine v3.5 | c-ares | 1.12.0-r1 | — |
| Alpine v3.5 | nodejs | 6.9.5-r1 | — |
| Alpine v3.4 | c-ares | 1.12.0-r1 | — |
| Alpine v3.4 | nodejs | 6.7.0-r1 | — |
| Alpine v3.3 | c-ares | 1.12.0-r1 | — |
Advisories 10
- USN-4796-1 nodejs vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2017:2908 Red Hat Security Advisory: rh-nodejs6-nodejs security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3395-1 c-ares vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-998-1 c-ares - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1792-1 Security update for libcares2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10668-1 c-ares-devel-1.17.2-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2168-1 Security update for nodejs4, nodejs6 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14246-1 Security update for Mozilla Firefox SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0008 F5 BIG-IP: Schwachstelle ermöglicht Denial of Service und Informationsoffenlegung BSI CERT-Bund (WID) · Jan 5, 2025
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023