Ubuntu.comUB:CVE-2021-24119CVE-2021-24119
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
48.7%
In Trusted Firmware Mbed TLS 2.24.0, a side-channel vulnerability in base64
PEM file decoding allows system-level (administrator) attackers to obtain
information about secret RSA keys via a controlled-channel and side-channel
attack on software running in isolated environments that can be single
stepped, especially Intel SGX.
Notes
| Author | Note |
|---|---|
| seth-arnold | It looks like an entire new class of side-channel-free functions was introduced in newer versions of mbedtls; backporting all of them probably doesn’t make sense, this fix only makes sense in context of trying to provide constant-time execution that limits side-channel bandwidth to adversaries on the same machine. |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
48.7%