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CVE Record

CVE-2019-19907: HrAddFBBlock in libfreebusy/freebusyutil.cpp in Kopano Groupware Core before 8.7.7 allows out-of-bounds acc...

HrAddFBBlock in libfreebusy/freebusyutil.cpp in Kopano Groupware Core before 8.7.7 allows out-of-bounds access, as demonstrated by mishandling of an array copy during parsing of ICal data.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Kopano Groupware Core before 8.7.7 has a memory access flaw while processing ICal free/busy calendar data. The supplied sources do not show active exploitation, CVSS scoring, or confirmed business impact. Treat exposure as relevant where Kopano handles calendar data from users or external senders.

Executive priority

Prioritize remediation if Kopano is in production or processes external calendar data. Urgency is lower than known-exploited issues because exploitation and severity are not confirmed, but the memory-safety nature warrants timely patching.

Technical view

The flaw is in HrAddFBBlock in libfreebusy/freebusyutil.cpp. Sources describe out-of-bounds access caused by mishandling an array copy during ICal parsing. The provided evidence identifies Kopano Groupware Core before 8.7.7 and a Debian kopanocore security update, but does not define CWE, CVSS, or exploit primitives.

Likely exposure

Likely exposure is limited to systems running Kopano Groupware Core before 8.7.7, especially deployments processing ICal calendar/freebusy data. The source bundle does not provide CPEs or complete downstream package version ranges beyond the Debian security update reference.

Exploitation context

No CISA KEV listing is reported, and the supplied sources do not cite active exploitation or public exploit use. The vulnerability is demonstrated by malformed ICal parsing behavior, but real-world exploitability and operational impact are not established in the provided evidence.

Researcher notes

Evidence is sparse: no CVSS, CWE, CPE, exploit status, or detailed impact is supplied. Analysis should stay anchored to Kopano Core before 8.7.7, HrAddFBBlock, libfreebusy/freebusyutil.cpp, ICal parsing, the referenced commit, release notes, and Debian DLA.

Mitigation direction

  • Upgrade Kopano Groupware Core to 8.7.7 or later where applicable.
  • Apply Debian DLA 3354-1 kopanocore updates on affected Debian LTS systems.
  • Check Kopano release notes and vendor guidance for supported fixed builds.
  • Reduce exposure to untrusted ICal inputs where practical until patched.

Validation and detection

  • Inventory Kopano Groupware Core and kopanocore package versions.
  • Confirm whether deployed versions are earlier than 8.7.7.
  • Review calendar/freebusy services for ICal processing exposure.
  • Verify Debian hosts have the DLA 3354-1 security update installed.
  • Monitor vendor advisories for additional affected version details.
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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ATT&CK lookup starting points

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CVE-2019-19907 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
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

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