CVE-2019-1119

published 2019-07-15

CVE-2019-1119: A remote code execution vulnerability exists in the way that DirectWrite handles objects in memory, aka 'DirectWrite Remote Code Execution Vulnerability'. This…

Priority P2 66 high 8.8 CVSS 3.0

AV N AC L PR N UI R S U C H I H A H

EXPLOIT

A remote code execution vulnerability exists in the way that DirectWrite handles objects in memory, aka 'DirectWrite Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-1117, CVE-2019-1118, CVE-2019-1120, CVE-2019-1121, CVE-2019-1122, CVE-2019-1123, CVE-2019-1124, CVE-2019-1127, CVE-2019-1128.

Affected

34 ranges · showing 25

Vendor	Product	Version range	Fixed in
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows	—	—
microsoft	windows_10	—	—
microsoft	windows_10	—	—
microsoft	windows_10	—	—
microsoft	windows_10	—	—
microsoft	windows_10_version_1903_for_32-bit_systems	—	—
microsoft	windows_10_version_1903_for_arm64-based_systems	—	—
microsoft	windows_10_version_1903_for_x64-based_systems	—	—
microsoft	windows_server	—	—
microsoft	windows_server	—	—
microsoft	windows_server	—	—
microsoft	windows_server_2016	—	—
microsoft	windows_server_2016	—	—
msrc	windows_10_version_1709_for_32-bit_systems	—	—
msrc	windows_10_version_1709_for_arm64-based_systems	—	—
msrc	windows_10_version_1709_for_x64-based_systems	—	—
msrc	windows_10_version_1803_for_32-bit_systems	—	—

Detection & IOCs extracted from sources · hover to see the quote

url https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/47092.zip↗

process DWrite!t2Decode↗

process DWrite!AdobeCFF2Snapshot↗

process DWrite!FontInstancer::InstanceCffTable↗

process DWrite!DWriteFontFace::CreateInstancedStream↗

process d2d1!dxc::TextConvertor::InstanceFontResources↗

• → Trigger path requires a user to print (to PDF, XPS, or physical/virtual printer) a webpage containing a specially crafted OpenType variable font in Microsoft Edge, invoking the Direct2D printing interface and ultimately the vulnerable AFDKO CFF2 font parsing code. ↗
• → The vulnerability is triggered via a malicious OpenType CFF2 (variable font) file. Monitor for anomalous font parsing activity in DWrite.dll, specifically calls to AdobeCFF2Snapshot → FontInstancer::InstanceCffTable → t2Decode originating from Edge renderer processes. ↗
• → The exploit requires the print action to be initiated by the user; monitor for Edge renderer processes spawning print-related COM calls (CXpsPrintControl::Close, CPrintManagerTemplatePrinter::endPrint) shortly after loading external font resources. ↗

• · The exploit requires user interaction: the victim must explicitly trigger printing (to PDF, XPS, or a printer) of a page containing the malicious variable font. Drive-by without print action is not sufficient. ↗
• · Microsoft's exploit assessment rates exploitation as 'Less Likely' for both latest and older software releases, and the vulnerability had not been publicly exploited at time of disclosure. ↗

CVSS provenance

nvd v3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd v2.0 9.3 CRITICAL AV:N/AC:M/Au:N/C:C/I:C/A:C

vendor_msrc 7.8 HIGH

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