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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2023-28319
HistoryMay 26, 2023 - 9:15 p.m.

CVE-2023-28319

2023-05-2621:15:10
Alpine Linux Development Team
security.alpinelinux.org
65
vulnerability
use after free
curl
ssh server
sha 256
sensitive data
exposure

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

59.7%

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH serverโ€™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.

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

59.7%