CVE-2020-8617

Advisory lineage Upstream: 0 Downstream: 27
Modified
Published: 19 May 2020, 14:05
Last modified:16 Sept 2024, 20:26

Vulnerability Summary

Overall Risk (default)
high
59/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
92.63% CRITICAL
93% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

19 May 2020, 14:05
Published
Vulnerability first disclosed
16 Sept 2024, 20:26
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 92.63%• Percentile: 100%

Techniques & Countermeasures

  • CWE-617•Reachable Assertion

    The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 18.04 | 19.10 | 20.04

  • debian•debian_linux

    8.0 | 9.0 | 10.0

  • fedoraproject•fedora

    31 | 32

  • isc•bind

    ≥ 9.0.0, ≤ 9.11.18 | ≥ 9.12.0, ≤ 9.12.4 | ≥ 9.13.0, ≤ 9.13.7 | ≥ 9.14.0, ≤ 9.14.11 | ≥ 9.15.0, ≤ 9.15.6 | ≥ 9.16.0, ≤ 9.16.2 | ≥ 9.17.0, ≤ 9.17.1 | 9.12.4:p1 | 9.12.4:p2 | 9.9.3:s1 | 9.10.5:s1 | 9.10.7:s1 | 9.11.3:s1 | 9.11.5:s3 | 9.11.5:s5 | 9.11.6:s1 | 9.11.7:s1 | 9.11.8:s1

  • isc•bind9

    9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview Edition from 9.9.3-S1 -> 9.11.18-S1

  • opensuse•leap

    15.1 | 15.2

References (12)