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CVE Record

CVE-2011-2207: dirmngr before 2.1.0 improperly handles certain system calls, which allows remote attackers to cause a deni...

dirmngr before 2.1.0 improperly handles certain system calls, which allows remote attackers to cause a denial of service (DOS) via a specially-crafted certificate.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2011-2207 is a denial-of-service issue in dirmngr before 2.1.0. A remote attacker may be able to disrupt service by presenting a specially crafted certificate. The bundle does not indicate data theft, code execution, or active exploitation.

Executive priority

Address during normal vulnerability remediation, faster for systems exposed to untrusted certificates. This is a service-availability risk, not a confirmed breach-enabling issue based on the supplied evidence.

Technical view

dirmngr improperly handles certain blocking system calls while verifying a certificate. Public descriptions say a specially crafted certificate can trigger denial of service. The affected product is dirmngr before the 2.1.0 fix; no CVSS vector or CWE is provided in the bundle.

Likely exposure

Exposure is limited to systems running dirmngr before 2.1.0, especially where dirmngr processes certificates from untrusted or remote sources. The bundle does not identify specific distributions, packaged versions, or default deployment paths as affected.

Exploitation context

The source bundle supports remote denial of service via a crafted certificate. It does not provide evidence of public exploit availability, exploitation in the wild, or KEV listing. Treat exploitation status as unconfirmed beyond the described attack condition.

Researcher notes

Evidence is sparse: the bundle names the flaw class, affected version boundary, and denial-of-service impact, but lacks CVSS, CWE, root-cause detail, and exploit telemetry. Avoid expanding scope beyond dirmngr before 2.1.0.

Mitigation direction

  • Upgrade dirmngr to version 2.1.0 or later where available.
  • Check Debian and Red Hat guidance for distribution-specific package status.
  • Prioritize systems that process externally supplied certificates.
  • Apply compensating controls if vendor packages are unavailable.
  • Monitor certificate-processing services for unexplained hangs or crashes.

Validation and detection

  • Inventory installed dirmngr versions across Linux systems.
  • Confirm whether any instance is older than 2.1.0.
  • Review package advisories from the relevant operating-system vendor.
  • Check service logs for certificate-verification failures or denial-of-service symptoms.
  • Verify remediation by confirming the fixed package version after update.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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-2011-2207 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
dirmngrdirmngr1.1.0, fixed in 2.1.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.