Security readout for executives and security teams
Plain-English summary
CVE-2019-20138 is a weak password-hashing issue in the Nim HTTP Authentication library before 2019-12-27. If an application stored credentials with this library, stolen password hashes may be easier to crack than intended. The supplied sources do not provide CVSS, affected package metadata, or evidence of exploitation.
Executive priority
Treat this as a targeted dependency hygiene issue, not a confirmed emergency. Prioritize verification if the organization runs Nim-based authentication code or stores customer credentials through this library.
Technical view
The issue is that nim-httpauth did not use libsodium crypto_pwhash_str's default algorithm before the 2019-12-27 fix commit. This weakens password hashing strength for applications relying on the library's affected behavior. The CVE record lists vendor/product as n/a and provides no CWE or CVSS details.
Likely exposure
Exposure appears limited to Nim applications using the HTTP Authentication library, specifically nim-httpauth, before the 2019-12-27 fix. Organizations without Nim services or this dependency are unlikely to be exposed based on the supplied sources.
Exploitation context
The source bundle does not show CISA KEV inclusion, active exploitation, or public exploit evidence. Practical risk would depend on whether attackers can obtain stored password hashes from an affected application or database.
Researcher notes
Evidence is sparse: no CVSS, CWE, complete affected-version metadata, or exploit reporting is included. The GitHub commit is the primary technical artifact. Analysis should stay focused on dependency presence, deployed version, and credential-storage impact.
Mitigation direction
- Identify Nim services using nim-httpauth before the 2019-12-27 fix.
- Update to a version containing commit 15fd0686dc363075c08976ad897d6c92e1e6283c or later.
- Check maintainer guidance for password hash migration or rehash requirements.
- Prioritize credential rotation if affected hashes may have been exposed.
Validation and detection
- Review dependency manifests and lockfiles for nim-httpauth usage.
- Confirm deployed builds include the 2019-12-27 password-hashing fix.
- Check whether affected applications stored user password hashes.
- Review incident history for possible exposure of credential stores.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-20138 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
- https://github.com/FedericoCeratto/nim-httpauth/commit/15fd0686dc363075c08976ad897d6c92e1e6283cCVE 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.