CVE-2022-38177
By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can trigger a small memory leak. It is possible to gradually erode available memory to the point where named crashes for lack of resources.
- Affected products
- Alt Linux, Almalinux, Astra Linux, Bind, Bind Server, Centos, Ibm Aix, Linuxmint
- Isc Bind
- ≤ 9.16.32, 9.9.3, 9.9.12, 9.9.13, 9.10.5, 9.10.7, 9.11.3, 9.11.5, 9.11.6, 9.11.7, 9.11.8, 9.11.12, 9.11.14-s1, 9.11.19-s1, 9.11.21, 9.11.27, 9.11.29, 9.11.35, 9.11.37, 9.16.8, 9.16.11, 9.16.13, 9.16.21
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 2.6% (84th percentile)
- Weakness
- CWE-401
- NVD status
- Modified
- Published
- 2022-09-21
Fix
Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.33, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.16.33-S1.
Workaround
Disable the following algorithms in your configuration using the disable-algorithms option: ECDSAP256SHA256, ECDSAP384SHA384. Note that this causes zones signed with these algorithms to be treated as insecure.
No indexed exploits for CVE-2022-38177 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2022-38177 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.