CVE-2019-9851

medium

Published 2020-04-28 · Modified 2020-04-28

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

6.5

Description

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. Protection was added, to address CVE-2019-9848, to block calling LibreLogo from document event script handers, e.g. mouse over. However LibreOffice also has a separate feature where documents can specify that pre-installed scripts can be executed on various global script events such as document-open, etc. In the fixed versions, global script event handlers are validated equivalently to document script event handlers. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.

Predictions

Exploit likelihood

90%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-47298 remote multiple

LoadLow · 2019-08-21

LibreOffice < 6.2.6 Macro - Python Code Execution (Metasploit)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_multi/fileformat/libreoffice_logo_exec rank 300

LibreOffice Macro Python Code Execution

Source fetch failed: fetch_error — view the original via the link above.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1:6.3.0-1`
sid	Fixed	`1:6.3.0-1`
forky	Fixed	`1:6.3.0-1`
bullseye	Fixed	`1:6.3.0-1`
bookworm	Fixed	`1:6.3.0-1`

Red Hat Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.