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皆様

TDFより以下のとおり脆弱性の修正についてお知らせがありました。
LibreOffice 6.2.7もしくは6.3.1に更新することが推奨されます。

具体的には、以前のバージョンでは文書内のマクロへのURLのデコード処理に
瑕疵がありました。このためセキュリティ設定に従ってブロックされるはずの
マクロが実行される可能性がありました。

-- Takeshi Abe

On Fri, 27 Sep 2019 10:30:23 +0100, Caolán McNamara <caolanm@redhat.com> wrote:
tl;dr: Ensure you are upgraded to at least 6.2.7 and 6.3.1

----

CVE-2019-9853: Insufficient URL decoding flaw in categorizing macro
location

LibreOffice documents can contain macros. The execution of those macros
is controlled by the document security settings, typically execution of
macros are blocked by default.

A URL decoding flaw existed in how the urls to the macros within the
document were processed and categorized, resulting in the possibility
to construct a document where macro execution bypassed the security
settings.

The documents were correctly detected as containing macros, and
prompted the user to their existence within the documents, but macros
within the document were subsequently not controlled by the security
settings allowing arbitrary macro execution

This issue affects:
LibreOffice 6.2 series versions prior to 6.2.6;
LibreOffice 6.3 series versions prior to 6.3.1.

Because CVE-2019-9854 and CVE-2019-9855 exist in 6.2.6, 6-2 series
users are recommended to upgrade to 6.2.7

Thanks to Nils Emmerich of ERNW Research GmbH for discovering and
reporting this issue.



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