Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-8617

Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures a local session key even on servers whose configuration does not otherwise make use of it, almost all current BIND servers are vulnerable. In releases of BIND dating from March 2018 and after, an assertion check in tsig.c detects this inconsistent state and deliberately exits. Prior to the introduction of the check the server would continue operating in an inconsistent state, with potentially harmful results.

Published

2020-05-19T14:15:11.987

Last Modified

2024-11-21T05:39:07.990

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-617

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	isc	bind	≤ 9.11.18	Yes
Application	isc	bind	≤ 9.12.4	Yes
Application	isc	bind	≤ 9.13.7	Yes
Application	isc	bind	≤ 9.14.11	Yes
Application	isc	bind	≤ 9.15.6	Yes
Application	isc	bind	≤ 9.16.2	Yes
Application	isc	bind	≤ 9.17.1	Yes
Application	isc	bind	9.12.4	Yes
Application	isc	bind	9.12.4	Yes
Application	isc	bind	9.9.3	Yes
Application	isc	bind	9.10.5	Yes
Application	isc	bind	9.10.7	Yes
Application	isc	bind	9.11.3	Yes
Application	isc	bind	9.11.5	Yes
Application	isc	bind	9.11.5	Yes
Application	isc	bind	9.11.6	Yes
Application	isc	bind	9.11.7	Yes
Application	isc	bind	9.11.8	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	fedoraproject	fedora	31	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	opensuse	leap	15.1	Yes
Operating System	opensuse	leap	15.2	Yes
Operating System	canonical	ubuntu_linux	12.04	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	19.10	Yes
Operating System	canonical	ubuntu_linux	20.04	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html Mailing List, Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html Third Party Advisory, VDB Entry ([email protected])
http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List, Patch, Third Party Advisory ([email protected])
https://kb.isc.org/docs/cve-2020-8617 Patch, Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/ ([email protected])
https://security.netapp.com/advisory/ntap-20200522-0002/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/4365-1/ Third Party Advisory ([email protected])
https://usn.ubuntu.com/4365-2/ Third Party Advisory ([email protected])
https://www.debian.org/security/2020/dsa-4689 Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/157836/BIND-TSIG-Denial-Of-Service.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://kb.isc.org/docs/cve-2020-8617 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20200522-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4365-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4365-2/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2020/dsa-4689 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)