Ubuntu.comUB:CVE-2020-36242CVE-2020-36242
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
0.008 Low
EPSS
Percentile
82.0%
In the cryptography package before 3.3.2 for Python, certain sequences of
update calls to symmetrically encrypt multi-GB values could result in an
integer overflow and buffer overflow, as demonstrated by the Fernet class.
Bugs
Notes
| Author | Note |
|---|---|
| mdeslaur | Versions in groovy and earlier don’t support chunking in update_into. Attempting reproducer on groovy and focal errors out with: OverflowError: integer 4294967296 does not fit ‘32-bit int’ which seems to indicate there is a size check being performed and they aren’t vulnerable to this issue. |
Related
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
0.008 Low
EPSS
Percentile
82.0%