Security readout for executives and security teams
Plain-English summary
Narcissus has a critical flaw that can let an unauthenticated remote attacker run operating-system commands through its image configuration backend. For a business, exposure matters only where the legacy Narcissus service is still deployed and reachable. The provided sources show public exploit material, but do not show active exploitation or a vendor patch.
Executive priority
Treat as urgent only where Narcissus is present. Public exploit references and unauthenticated command execution make exposed instances high business risk, but organizations not running Narcissus are not affected based on the provided sources.
Technical view
backend.php passes an unsanitized release parameter into configure_image(), which invokes PHP passthru(). This is OS command injection, CWE-78, with CVSS 4.0 score 9.3. Successful exploitation runs commands as the web server user. Sources identify Ångström Distribution Project Narcissus; no maintained fixed version is named in the bundle.
Likely exposure
Likely exposure is limited to organizations still running Narcissus, especially internet-facing backend.php or image configuration workflows. The bundle does not identify other affected products or specific vulnerable version ranges beyond Narcissus.
Exploitation context
The bundle includes Metasploit and Exploit-DB references, so public exploit knowledge exists. KEV is false, and no cited source in the bundle states active exploitation in the wild.
Researcher notes
Do not assume broad exposure. Focus validation on Narcissus deployments and backend.php reachability. Evidence supports command injection through release handling and passthru(), public exploit availability, and critical severity. Evidence does not establish active exploitation or a vendor-supplied patch.
Mitigation direction
- Inventory systems for Narcissus and exposed backend.php instances.
- Remove or disable Narcissus if it is no longer required.
- Restrict access to Narcissus administration paths to trusted networks.
- Check vendor or distribution guidance for any maintained fix.
- Monitor web server processes and logs for unexpected command execution.
Validation and detection
- Confirm whether Narcissus is installed on any internal or internet-facing hosts.
- Review web routes for accessible backend.php endpoints.
- Check server logs for suspicious POST requests to image configuration workflows.
- Verify the web server account has minimal operating-system privileges.
- Document findings and remediation status in the vulnerability register.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2012-10033 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
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/narcissus_backend_exec.rbCVE reference · exploit
- https://www.exploit-db.com/exploits/22709CVE reference · exploit
- https://www.exploit-db.com/exploits/22856CVE reference · exploit
- https://web.archive.org/web/20101127002623/https://narcissus.angstrom-distribution.org/CVE reference · product
- https://www.vulncheck.com/advisories/narcissus-image-config-command-injectionCVE reference · third-party-advisory
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 Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.