Security readout for executives and security teams
Plain-English summary
CVE-2018-4056 lets an unauthenticated attacker bypass login to the coTURN administrator web portal through SQL injection in the username handling. If the admin portal is reachable, the attacker could gain administrative web access to the TURN service, creating high integrity and availability risk.
Executive priority
Treat this as urgent for any internet-reachable coTURN administration interface. The issue can bypass authentication without user interaction and may allow control of service administration, but exposure depends on whether the admin portal is deployed and reachable.
Technical view
coTURN versions before 4.5.0.9 contain SQL injection in the administrator web portal login path. A crafted username in a login message can bypass authentication via the external interface. The CVSS 3.0 score is 9.1, with network access, low complexity, no privileges, and no user interaction required.
Likely exposure
Exposure is most likely where coTURN, including version 4.5.0.5 or packages older than fixed vendor releases, runs with the administrator web portal reachable from external networks.
Exploitation context
The sources describe an exploitable authentication bypass but do not cite active exploitation, and the CVE is not marked KEV in the provided bundle.
Researcher notes
The affected-range evidence differs in granularity: the CVE description says prior to 4.5.0.9, while the structured affected entry names coTURN 4.5.0.5. Validate package lineage and downstream backports before concluding a host is vulnerable.
Mitigation direction
- Upgrade coTURN to version 4.5.0.9 or later where applicable.
- Apply Debian coturn security updates from DSA-4373 or DLA-1671-1 if using Debian packages.
- Restrict administrator web portal access to trusted management networks.
- Check current vendor guidance for supported fixed packages and configuration recommendations.
Validation and detection
- Inventory coTURN deployments and record exact package or upstream versions.
- Confirm whether the administrator web portal is enabled and externally reachable.
- Verify Debian systems include the security updates referenced in DSA-4373 or DLA-1671-1.
- Review administrative portal authentication logs for unexpected successful access.
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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-4056 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
- 9.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H3.95.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.1CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- [debian-lts-announce] 20190211 [SECURITY] [DLA 1671-1] coturn security updateCVE reference · mailing-list, x_refsource_MLIST
- DSA-4373CVE reference · vendor-advisory, x_refsource_DEBIAN
- https://talosintelligence.com/vulnerability_reports/TALOS-2018-0730CVE 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.