CVE-2017-1000257
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,…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 6.2% · top 6.4% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
Affected products
n/a
- affected n/a
References (8)
- https://curl.haxx.se/docs/adv_20171023.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:3263 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- GLSA-201712-04 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 1039644 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- RHSA-2018:3558 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 101519 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-4007 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- RHSA-2018:2486 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-1000257)Record last updated .