Security readout for executives and security teams
Plain-English summary
This is an old ftpd race-condition flaw that could let an authenticated network user read or write files they should not access. The source bundle does not identify a specific vendor or version, so urgency depends on whether legacy FTP daemons remain deployed.
Executive priority
Prioritize this as a legacy exposure and asset-management issue. It is not presented as actively exploited in the supplied sources, but any remaining FTP service with unclear ownership deserves prompt review because file integrity and confidentiality are involved.
Technical view
CVE-1999-0035 describes a race condition in an ftpd signal-handling routine. The recorded impact is arbitrary file read/write with low confidentiality and integrity impact, network reachability, low attack complexity, and required low privileges. The affected product data is not specific in the supplied record.
Likely exposure
Most exposure is likely in legacy or poorly inventoried FTP services. The bundle lists affected vendor, product, and versions as unavailable, so teams must map this against actual ftpd implementations in use.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV in the bundle. Treat exploit status as unconfirmed unless vendor or threat-intelligence sources provide stronger evidence.
Researcher notes
The record is sparse: no concrete vendor, version range, patch, or workaround is supplied beyond the ftpd signal-handling race description. Avoid broad product claims without implementation-specific evidence.
Mitigation direction
- Identify any running FTP daemons and confirm whether they are still business-required.
- Disable FTP services that are no longer needed.
- Restrict FTP access to trusted networks and authenticated users.
- Check vendor guidance for the specific ftpd implementation and version.
- Replace unsupported legacy ftpd services with maintained software.
Validation and detection
- Inventory internet-facing and internal hosts exposing FTP service.
- Record each ftpd implementation name, package source, and version.
- Compare identified software against vendor advisories for CVE-1999-0035.
- Review service permissions for unintended file read or write scope.
- Check logs for unusual authenticated FTP file activity.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-364: Exact CWE lookup
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Open ATT&CK lookupCVE-1999-0035 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
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:L/UI:N/S:U/C:L/I:L/A:N2.82.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0035CVE reference · x_refsource_MISC
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.
Signal Handler Race Condition
Signal Handler Race Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.