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CVE-2023-28319

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Date: May 26, 2023

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.

Language: C

Severity Score

Related Resources (14)

https://support.apple.com/kb/HT213843
http://seclists.org/fulldisclosure/2023/Jul/52
https://curl.se/docs/CVE-2023-28319.html
https://support.apple.com/kb/HT213844
https://support.apple.com/kb/HT213845
https://security.gentoo.org/glsa/202310-12
https://github.com/curl/curl/commit/8e21b1a05f3c0ee098dbcb6c
https://hackerone.com/reports/1913733
https://security.netapp.com/advisory/ntap-20230609-0009/
https://security-tracker.debian.org/tracker/CVE-2023-28319
https://nvd.nist.gov/vuln/detail/CVE-2023-28319
http://seclists.org/fulldisclosure/2023/Jul/48
http://seclists.org/fulldisclosure/2023/Jul/47
https://www.mend.io/vulnerability-database/CVE-2023-28319

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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