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CVE Record

CVE-2021-39360: In GNOME libzapojit through 0.0.3, zpj-skydrive.c does not enable TLS certificate verification on the SoupS...

In GNOME libzapojit through 0.0.3, zpj-skydrive.c does not enable TLS certificate verification on the SoupSessionSync objects it creates, leaving users vulnerable to network MITM attacks. NOTE: this is similar to CVE-2016-20011.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

GNOME libzapojit through 0.0.3 failed to verify TLS certificates for a Skydrive-related network session. A user on an affected system could be exposed if an attacker can intercept network traffic. The main business risk is confidentiality and integrity loss during affected communications, not broad remote compromise.

Executive priority

Treat as a targeted remediation item for Linux desktop or GNOME-adjacent environments, especially Fedora-managed fleets. It does not have confirmed active exploitation in the provided sources, but certificate validation failures can undermine trust in encrypted connections.

Technical view

The issue is in zpj-skydrive.c, where SoupSessionSync objects were created without enabling TLS certificate verification. Because the cited GNOME context says these session types defaulted to no certificate verification, affected libzapojit users were vulnerable to network man-in-the-middle attacks.

Likely exposure

Likely exposure is limited to systems or applications using GNOME libzapojit through version 0.0.3. The source bundle does not identify specific downstream applications beyond Fedora package advisories, so inventory should focus on installed libzapojit packages and dependencies.

Exploitation context

The cited record describes a network MITM condition, requiring an attacker able to intercept or manipulate traffic. The source bundle marks KEV as false and provides no cited evidence of active exploitation or public exploit use.

Researcher notes

Evidence is clear on the vulnerable condition and affected upstream version range, but incomplete on exact downstream application exposure, CVSS, CWE, and universal fix version. Avoid claiming exploitation or impact beyond network MITM without additional vendor evidence.

Mitigation direction

  • Apply vendor or distribution updates for libzapojit when available.
  • Review the GNOME libzapojit issue for project-specific remediation status.
  • Prioritize Fedora systems covered by the cited Fedora advisories.
  • If updates are unavailable, reduce use of affected libzapojit-dependent functionality.
  • Monitor vendor guidance before accepting compensating controls as sufficient.

Validation and detection

  • Inventory systems for GNOME libzapojit through version 0.0.3.
  • Confirm whether installed packages are covered by Fedora or other vendor advisories.
  • Verify updated package versions after remediation.
  • Review dependency manifests for applications linking against libzapojit.
  • Document systems where updates are unavailable or exposure cannot be confirmed.
Prepared
Confidence
medium
Sources
7

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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CVE-2021-39360 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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