CVE-2017-1000257An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes,…
- 9.1CriticalCVSS base score
- 6.2%Exploitation in 30 daysEPSS · top 6.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
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 (13 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.
Affected products
n/a
- affected n/a
References
References8
- 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)
- EUVD EUVD-2017-1518 (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://cveledger.app/cve/CVE-2017-1000257)Record last updated .