CVE-2017-1000257

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Source
https://cve.org/CVERecord?id=CVE-2017-1000257
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-1000257.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2017-1000257
Aliases
Downstream
Related
Published
2017-10-31T21:29:00.203Z
Modified
2026-05-15T12:03:07.093809386Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
[none]
Details

An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_FIELD",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "last_affected": "8.0"
                },
                {
                    "last_affected": "9.0"
                }
            ]
        }
    ]
}
References

Affected packages