Security readout for executives and security teams
CVE-2017-1000257 is a critical libcurl flaw in IMAP handling. A zero-byte FETCH response can make libcurl read past a heap buffer, potentially crashing the application or exposing memory to the application as downloaded data. Business impact depends on where libcurl processes IMAP responses, especially from untrusted mail servers. Exposure is most likely in applications, services, or appliances using libcurl for IMAP operations. The source bundle does not provide affected version ranges, so teams should map libcurl dependencies and consult curl and OS vendor advisories for applicability. Treat as urgent where libcurl handles IMAP from external or untrusted servers. The issue can cause availability loss and possible memory exposure, but the provided sources do not show active exploitation or define exact affected versions. Mitigation focus: Identify systems and applications using libcurl for IMAP.; Apply updates or backports from curl, Red Hat, Debian, Gentoo, or relevant vendors.; Prioritize internet-facing or third-party mail integrations first..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-119: Exact CWE lookup
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Open ATT&CK lookupCVE-2017-1000257 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H3.95.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://curl.haxx.se/docs/adv_20171023.htmlCVE reference · x_refsource_CONFIRM
- RHSA-2017:3263CVE reference · vendor-advisory, x_refsource_REDHAT
- GLSA-201712-04CVE reference · vendor-advisory, x_refsource_GENTOO
- RHSA-2018:3558CVE reference · vendor-advisory, x_refsource_REDHAT
- RHSA-2018:2486CVE reference · vendor-advisory, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.