6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
7.1 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
0.008 Low
EPSS
Percentile
81.7%
Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7
through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct
Regular Expression Denial of Service (ReDoS) attacks against a client
because of urllib.request.AbstractBasicAuthHandler catastrophic
backtracking.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 14.04 | noarch | python3.4 | < 3.4.3-1ubuntu1~14.04.7+esm6) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
ubuntu | 14.04 | noarch | python3.5 | < any | UNKNOWN |
ubuntu | 16.04 | noarch | python3.5 | < 3.5.2-2ubuntu0~16.04.10 | UNKNOWN |
ubuntu | 18.04 | noarch | python3.6 | < 3.6.9-1~18.04ubuntu1 | UNKNOWN |
ubuntu | 18.04 | noarch | python3.7 | < 3.7.5-2ubuntu1~18.04.2 | UNKNOWN |
ubuntu | 19.10 | noarch | python3.7 | < 3.7.5-2~19.10ubuntu1 | UNKNOWN |
ubuntu | 18.04 | noarch | python3.8 | < 3.8.0-3ubuntu1~18.04.2 | UNKNOWN |
ubuntu | 20.04 | noarch | python3.8 | < 3.8.2-1ubuntu1.1 | UNKNOWN |
ubuntu | 20.10 | noarch | python3.8 | < 3.8.2-1ubuntu1.1 | UNKNOWN |
ubuntu | 18.04 | noarch | python2.7 | < 2.7.17-1~18.04ubuntu1 | UNKNOWN |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8492
github.com/python/cpython/commit/0b297d4ff1c0e4480ad33acae793fbaf4bf015b4
github.com/python/cpython/pull/18284
launchpad.net/bugs/cve/CVE-2020-8492
nvd.nist.gov/vuln/detail/CVE-2020-8492
python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html
security-tracker.debian.org/tracker/CVE-2020-8492
ubuntu.com/security/notices/USN-4333-1
ubuntu.com/security/notices/USN-4333-2
ubuntu.com/security/notices/USN-4754-3
ubuntu.com/security/notices/USN-5200-1
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
7.1 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
0.008 Low
EPSS
Percentile
81.7%