CVE-2024-43167
Fixed in a distro release EPSS <1%CVSS 2.8
DISPUTE NOTE: this issue does not pose a security risk as it (according to analysis by the original software developer, NLnet Labs) falls within the expected functionality and security controls of the application. Red Hat has made a claim that there is a security risk within Red Hat products. NLnet Labs has no further information about the claim, and suggests that affected Red Hat customers refer to available Red Hat documentation or support channels. ORIGINAL DESCRIPTION: A NULL pointer dereference flaw was found in the ub_ctx_set_fwd function in Unbound. This issue could allow an attacker who can invoke specific sequences of API calls to cause a segmentation fault. When certain API functions such as ub_ctx_set_fwd and ub_ctx_resolvconf are called in a particular order, the program attempts to read from a NULL pointer, leading to a crash. This issue can result in a denial of service by causing the application to terminate unexpectedly.
Products: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 11 | unbound | 1.13.1-1+deb11u3 |
| Debian 12 | unbound | 1.17.1-2+deb12u3 |
| Debian 13 | unbound | 1.21.1-1 |
| Debian 14 | unbound | 1.21.1-1 |
| SUSE Linux Enterprise Micro 5.5 | unbound | 1.20.0-150100.10.16.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | unbound | 1.20.0-150100.10.16.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | unbound | 1.20.0-150600.23.6.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | unbound | 1.20.0-150100.10.16.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | unbound | 1.20.0-150600.23.6.1 |
| Ubuntu 20.04 LTS | unbound | 1.9.4-2ubuntu1.8 |
| Ubuntu 22.04 LTS | unbound | 1.13.1-1ubuntu5.7 |
| Ubuntu 24.04 LTS | unbound | 1.19.2-1ubuntu3.2 |
| Ubuntu Pro 14.04 LTS | unbound | 1.4.22-1ubuntu4.14.04.3+esm1 |
| Ubuntu Pro 16.04 LTS | unbound | 1.5.8-1ubuntu1.1+esm1 |
| Ubuntu Pro 18.04 LTS | unbound | 1.6.7-1ubuntu2.6+esm2 |
| openSUSE Leap 15.5 | unbound | 1.20.0-150100.10.16.1 |
| openSUSE Leap 15.6 | unbound | 1.20.0-150600.23.6.1 |
| openSUSE Tumbleweed | unbound | 1.21.0-1.1 |