Description
libdns in ISC BIND 9.7.x and 9.8.x before 9.8.4-P2, 9.8.5 before 9.8.5b2, 9.9.x before 9.9.2-P2, and 9.9.3 before 9.9.3b2 on UNIX platforms allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression, as demonstrated by a memory-exhaustion attack against a machine running a named process.
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 | bind9 | 1:9.8.4.dfsg.P1-6+nmu1 | — |
| Debian 13 | bind9 | 1:9.8.4.dfsg.P1-6+nmu1 | — |
| Debian 12 | bind9 | 1:9.8.4.dfsg.P1-6+nmu1 | — |
| Debian 6.0 | bind9 | 1:9.7.3.dfsg-1~squeeze10 | DSA-2656-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | bind +5 | 32:9.8.2-0.17.rc1.el6_4.4 | RHSA-2013:0689 |
| RHEL 5 | bind97 +4 | 32:9.7.0-17.P2.el5_9.1 | RHSA-2013:0690 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.10.3P4-21.1 | openSUSE-SU-2024:10467-1 |
| openSUSE Tumbleweed | dhcp | 4.3.3.P1-3.1 | openSUSE-SU-2024:10358-1 |
Advisories 6
- RHSA-2013:0689 Red Hat Security Advisory: bind security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2656-1 bind9 - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10467-1 bind-9.10.3P4-21.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2013:0690 Red Hat Security Advisory: bind97 security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2025-1175 Internet Systems Consortium BIND: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · May 29, 2025
- openSUSE-SU-2024:10358-1 dhcp-4.3.3.P1-3.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- https://kb.isc.org/article/AA-00871/
- FEDORA-2013-4533 vendor-advisory
- http://linux.oracle.com/errata/ELSA-2014-1244
- RHSA-2013:0689 vendor-advisory
- http://www.isc.org/software/bind/advisories/cve-2013-2266
- https://kb.isc.org/article/AA-00879/
- FEDORA-2013-4525 vendor-advisory
- HPSBUX02876 vendor-advisory
- 58736 vdb-entry
- RHSA-2013:0690 vendor-advisory
- APPLE-SA-2013-09-12-1 vendor-advisory
- oval:org.mitre.oval:def:19579 vdb-entry signature
- DSA-2656 vendor-advisory
- http://support.apple.com/kb/HT5880
- USN-1783-1 vendor-advisory