CVE-2024-43167: Unbound: null pointer dereference in unbound
First published: Thu Aug 08 2024(Updated: )
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.
Credit: secalert@redhat.com sep@nlnetlabs.nl
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/unbound | <=1.13.1-1+deb11u2<=1.17.1-2+deb12u2<=1.20.0-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2024-43167
- https://bugzilla.redhat.com/show_bug.cgi?id=2303456
- https://github.com/NLnetLabs/unbound/issues/1072
- https://github.com/NLnetLabs/unbound/pull/1073/files
- https://github.com/NLnetLabs/unbound/pull/1073
- https://github.com/NLnetLabs/unbound/commit/8e43e2574c4e02f79c562a061581cdcefe136912
- https://security-tracker.debian.org/tracker/CVE-2024-43167
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43167
- https://nvd.nist.gov/vuln/detail/CVE-2024-43167
- https://launchpad.net/bugs/cve/CVE-2024-43167
- https://ubuntu.com/security/CVE-2024-43167
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