CVE-2023-28319

2023-05-2600:00:00

CWE-416

hackerone

www.cve.org

use after free

curl

vulnerability

ssh

public key

memory

error message

heap-based data

7.8 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

55.1%

JSON

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.

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "https://github.com/curl/curl",
    "versions": [
      {
        "version": "Fixed in 8.1.0",
        "status": "affected"
      }
    ]
  }
]