CVE-2020-8623
A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c
- Published
- Updated
- Reserved
- Assigned by
- isc
Description
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| iscCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 6.6% · top 6.1% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- If BIND is built with "--enable-native-pkcs11" then a specially crafted query for a zone signed with RSA can trigger an assertion failure. Affects BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition
- CWE-617 (opens in a new tab)All about CWE-617 and its CVEs
Affected products
What to do
Solution: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.22 BIND 9.16.6 BIND 9.17.4 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.22-S1
Workaround: No workarounds known.
Exploitation: We are not aware of any active exploits.
References (11)
- https://kb.isc.org/docs/cve-2020-8623 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2020-a02b7a0f21 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://security.netapp.com/advisory/ntap-20200827-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-4468-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-4752 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- FEDORA-2020-14c194e5af (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [debian-lts-announce] 20200829 [SECURITY] [DLA 2355-1] bind9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-202008-19 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://www.synology.com/security/advisory/Synology_SA_20_19 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2020:1699 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2020:1701 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-8623)Record last updated .