Security readout for executives and security teams
Tor versions before 0.4.6.5 had a flaw in stream handling. A malicious party could forge certain relay messages and bypass the intended control over who may end a stream. The sources do not provide CVSS, confirmed exploitation, or detailed business impact. Exposure is limited to systems running Tor before 0.4.6.5. Organizations should check endpoints, servers, appliances, containers, and Linux packages where Tor may be installed directly or as a dependency. Treat this as a targeted hygiene issue for environments using Tor. It deserves timely remediation where Tor is present, but the provided evidence does not support emergency enterprise-wide action absent exposed or sensitive Tor deployments. Mitigation focus: Upgrade Tor to 0.4.6.5 or later where Tor is installed.; Apply relevant Linux distribution security updates, including Gentoo guidance if applicable.; Check Tor Project advisories for any branch-specific upgrade instructions..
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.
CVE-2021-34548 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://gitlab.torproject.org/tpo/core/tor/-/issues/40389CVE reference · x_refsource_MISC
- https://blog.torproject.org/node/2041CVE reference · x_refsource_CONFIRM
- GLSA-202107-25CVE reference · vendor-advisory, x_refsource_GENTOO
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.