Security readout for executives and security teams
Plain-English summary
CVE-2020-12413 describes the Raccoon timing attack against DHE cipher suites in TLS. For Mozilla Firefox and Firefox ESR, the documented mitigation was disabling DHE cipher suite support. The issue is confidentiality-focused and rated medium, but exploitation requires difficult timing conditions.
Executive priority
Treat this as a moderate-priority browser exposure item. Prioritize managed Firefox and ESR update compliance, especially where older enterprise browser versions persist.
Technical view
The vulnerability is classified as CWE-203, observable discrepancy, and affects DHE cipher suite behavior inherited from the TLS specification. The CVSS 3.1 score is 5.9 with network attack vector, high attack complexity, no privileges, no user interaction, and high confidentiality impact only.
Likely exposure
Exposure is limited in the provided data to Mozilla Firefox and Firefox ESR, with affected versions listed only as unspecified. Environments relying on older Firefox or ESR builds that still support DHE cipher suites should be reviewed.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The high attack complexity rating indicates exploitation is timing-sensitive and difficult, but successful attacks could affect confidentiality.
Researcher notes
Evidence is sparse on exact affected versions and fixed releases in the supplied bundle. The key technical point is TLS DHE timing leakage, with Mozilla mitigation by disabling DHE cipher suites. Do not infer active exploitation from the CVE alone.
Mitigation direction
- Confirm Firefox and Firefox ESR are updated according to Mozilla guidance.
- Verify deployed builds include Mozilla's DHE cipher suite disablement.
- Review Mozilla Bugzilla for exact affected and fixed version details.
- If centrally managing TLS policy, avoid DHE cipher suites where vendor guidance permits.
Validation and detection
- Inventory Firefox and Firefox ESR versions across managed endpoints.
- Check browser TLS policy for remaining DHE cipher suite support.
- Review Mozilla advisories or Bugzilla entries for fixed-release mapping.
- Confirm vulnerability scanners distinguish DHE from non-DHE TLS configurations.
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-203: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCVE-2020-12413 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
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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:H/PR:N/UI:N/S:U/C:H/I:N/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://raccoon-attack.com/CVE reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2020-12413CVE reference
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.
Observable Discrepancy
Observable Discrepancy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.