Analyst readout for executives and security teams
Plain-English summary
This is an old Opera browser issue involving proxy error responses during HTTPS connection setup. A network attacker who can tamper with proxy traffic could cause script to run in the wrong browser context. The record has no CVSS score, no CISA KEV listing, and incomplete affected-version data.
Executive priority
Treat this as a legacy exposure review, not an emergency, unless old Opera installations still exist on managed systems. Business risk rises where sensitive web access occurs through interceptable or untrusted proxy paths.
Technical view
Opera, possibly before 9.25, used the HTTP Host header to decide document context for 4xx or 5xx CONNECT responses from a proxy. A man-in-the-middle modifying that response could execute arbitrary web script, described as an SSL tampering attack.
Likely exposure
Exposure appears limited to legacy Opera deployments, possibly before version 9.25, especially where browser traffic uses HTTP proxies. The CVE record does not provide CPEs or a complete affected-version matrix.
Exploitation context
The cited description requires a man-in-the-middle position and the ability to modify a proxy server CONNECT error response. The source bundle does not show active exploitation, public exploit use, or KEV inclusion.
Researcher notes
Key gaps are severity, CWE, precise affected versions, and vendor remediation detail. The useful validation path is asset discovery plus proxy-path review. Do not claim active exploitation based on the provided sources.
Mitigation direction
- Inventory endpoints for legacy Opera installations.
- Remove or upgrade unsupported Opera versions after checking vendor guidance.
- Reduce use of untrusted HTTP proxies for legacy browser traffic.
- Prefer managed, supported browsers for business web access.
- Monitor proxy logs for unusual CONNECT error patterns.
Validation and detection
- Confirm whether Opera versions around or before 9.25 exist in the environment.
- Check browser fleet management records for unsupported Opera installations.
- Review proxy architecture for CONNECT handling exposure.
- Verify whether affected legacy browsers can still access sensitive internal sites.
- Document absence or presence of compensating proxy controls.
Based on public source material and reviewed before publication.
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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CVE-2009-2059 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- http://research.microsoft.com/pubs/79323/pbp-final-with-update.pdfCVE reference · x_refsource_MISC
- http://research.microsoft.com/apps/pubs/default.aspx?id=79323CVE 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.