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CVE Record

CVE-2018-1000858: GnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that can...

GnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that can result in Attacker controlled CSRF, Information Disclosure, DoS. This attack appear to be exploitable via Victim must perform a WKD request, e.g. enter an email address in the composer window of Thunderbird/Enigmail. This vulnerability appears to have been fixed in after commit 4a4bb874f63741026bd26264c43bb32b1099f060.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw affects GnuPG dirmngr during Web Key Directory lookups. If a user triggers a WKD request, such as by entering an email address in Thunderbird with Enigmail, an attacker could cause unwanted requests that may expose information or disrupt service.

Executive priority

Treat this as a targeted remediation item, not an emergency based on the provided evidence. Prioritize systems with vulnerable GnuPG versions and mail workflows that trigger WKD lookups. Patch through vendor channels and document residual exposure where legacy clients remain.

Technical view

CVE-2018-1000858 is a CSRF issue in GnuPG dirmngr versions 2.1.12 through 2.2.11. The vulnerable path involves WKD key discovery requests. Reported impacts are attacker-controlled CSRF, information disclosure, and denial of service. Sources state it was fixed after commit 4a4bb874f63741026bd26264c43bb32b1099f060.

Likely exposure

Exposure is most likely where GnuPG 2.1.12 to 2.2.11 is installed and dirmngr is used for WKD key discovery, especially desktop mail workflows using Thunderbird and Enigmail. The bundle does not identify broader affected products or exact vulnerable package builds.

Exploitation context

The source bundle does not show known active exploitation, and the CVE is not marked KEV. Exploitation requires a victim action that triggers a WKD request. The reported outcomes are information disclosure and denial of service, but the provided sources do not include exploit prevalence or observed campaigns.

Researcher notes

Evidence is limited to the CVE record, SektionEins advisory/blog references, and Ubuntu’s advisory. No CVSS vector, CWE, exploit-in-the-wild evidence, or full affected product matrix is provided. Avoid assuming impact beyond GnuPG dirmngr WKD behavior in versions 2.1.12 through 2.2.11.

Mitigation direction

  • Upgrade GnuPG packages using vendor guidance, such as Ubuntu USN-3853-1 where applicable.
  • Ensure installed GnuPG is newer than 2.2.11 or contains the referenced fix commit.
  • Review mail-client WKD use where Thunderbird and Enigmail are deployed.
  • If patch status is unclear, check the operating system vendor advisory for backported fixes.

Validation and detection

  • Inventory endpoints and servers for GnuPG versions 2.1.12 through 2.2.11.
  • Confirm whether dirmngr and WKD key discovery are used in mail workflows.
  • Check package changelogs or vendor advisories for the referenced fix.
  • Verify Ubuntu systems have applied updates from USN-3853-1 where relevant.
Prepared
Confidence
medium
Sources
5

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

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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
4Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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