Vulnerability in Isc Bind
CVE-2020-8622
In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
EPSS: 0.056 (92.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Isc Bind — versions 9.9.3, 9.11.21
- Isc Bind9 — versions 9.0.0, unspecified, 9.12.0
- Netapp Steelstore_cloud_integrated_storage
- Oracle Communications_diameter_signaling_router
- Synology Dns_server
- Canonical Ubuntu_linux — versions 12.04, 14.04, 16.04
- Debian Debian_linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 31, 32
- Opensuse Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-officer@isc.org (x_refsource_CONFIRM, Vendor Advisory)
- security-officer@isc.org (x_refsource_FEDORA, vendor-advisory)
- security-officer@isc.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security-officer@isc.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security-officer@isc.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security-officer@isc.org (x_refsource_FEDORA, vendor-advisory)
- security-officer@isc.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security-officer@isc.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- security-officer@isc.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security-officer@isc.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2020-8622?
- CVE-2020-8622 is a medium-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2020-08-21.
- How severe is CVE-2020-8622?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-8622 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.