Ubuntu.comUB:CVE-2023-28319CVE-2023-28319
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
48.1%
A use after free vulnerability exists in curl <v8.1.0 in the way libcurl
offers a feature to verify an SSH server’s public key using a SHA 256 hash.
When this check fails, libcurl would free the memory for the fingerprint
before it returns an error message containing the (now freed) hash. This
flaw risks inserting sensitive heap-based data into the error message that
might be shown to users or otherwise get leaked and revealed.
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced in 7.81.0 in https://github.com/curl/curl/commit/3467e89bb97e6c87c7 This only affects curl when built with libssh2. Ubuntu packages contain a delta from debian to build with libssh instead of libssh2, so Ubuntu is not affected by this vulnerability. |
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
0.001 Low
EPSS
Percentile
48.1%