7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.005 Low
EPSS
Percentile
75.5%
An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | pypy3 | < 7.3.11+dfsg-1 | pypy3_7.3.11+dfsg-1_all.deb |
Debian | 11 | all | pypy3 | <= 7.3.5+dfsg-2+deb11u2 | pypy3_7.3.5+dfsg-2+deb11u2_all.deb |
Debian | 10 | all | pypy3 | <= 7.0.0+dfsg-3 | pypy3_7.0.0+dfsg-3_all.deb |
Debian | 999 | all | pypy3 | < 7.3.11+dfsg-1 | pypy3_7.3.11+dfsg-1_all.deb |
Debian | 13 | all | pypy3 | < 7.3.11+dfsg-1 | pypy3_7.3.11+dfsg-1_all.deb |
Debian | 11 | all | python2.7 | <= 2.7.18-8+deb11u1 | python2.7_2.7.18-8+deb11u1_all.deb |
Debian | 10 | all | python2.7 | < 2.7.16-2+deb10u2 | python2.7_2.7.16-2+deb10u2_all.deb |
Debian | 12 | all | python3.11 | < 3.11.1-1 | python3.11_3.11.1-1_all.deb |
Debian | 999 | all | python3.11 | < 3.11.1-1 | python3.11_3.11.1-1_all.deb |
Debian | 13 | all | python3.11 | < 3.11.1-1 | python3.11_3.11.1-1_all.deb |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.005 Low
EPSS
Percentile
75.5%