CVE-2019-8049

published 2019-08-20

CVE-2019-8049: Adobe Acrobat and Reader versions 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier…

Priority P2 67 critical 9.8 CVSS 3.1

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

EXPLOIT

Adobe Acrobat and Reader versions 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have a heap overflow vulnerability. Successful exploitation could lead to arbitrary code execution .

Affected

7 ranges

Vendor	Product	Version range	Fixed in
adobe	acrobat_dc	>= 15.006.30060 < 15.006.30499	15.006.30499
adobe	acrobat_dc	>= 15.008.20082 < 19.012.20036	19.012.20036
adobe	acrobat_dc	>= 17.011.30059 < 17.011.30144	17.011.30144
adobe	acrobat_reader_dc	>= 15.006.30060 < 15.006.30499	15.006.30499
adobe	acrobat_reader_dc	>= 15.008.20082 < 19.012.20036	19.012.20036
adobe	acrobat_reader_dc	>= 17.011.30059 < 17.011.30144	17.011.30144
adobe	adobe_acrobat_and_reader	—	—

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

url https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/47274.zip↗

process CoolType!CTCleanup+0x26ba7↗

• → Crash triggered immediately upon opening a malformed PDF containing a crafted Type 1 font stream; monitor for access violation (0xc0000005) in CoolType.dll during PDF open events. ↗
• → The exploit modifies exactly two bytes inside a Type 1 font stream at file offsets 0x3f523 and 0x40123 (0x65→0x75 and 0x15→0x05); YARA/binary-diff rules targeting these byte-offset mutations in PDF Type 1 font streams can identify the PoC. ↗
• → Heap-based buffer overflow manifests as an 8-byte off-by-one write in CoolType.dll (CTCleanup); PageHeap-enabled environments will crash more consistently, useful for controlled detection/testing. ↗
• → Vulnerable component is CoolType.dll (font rendering library) called from AcroRd32.dll; alert on AcroRd32.exe loading CoolType.dll and subsequently faulting during PDF open. ↗
• → Reproduces on Adobe Acrobat Reader DC version 2019.012.20035 on Windows 10; flag this specific version for patching priority. ↗

• · Affected versions span multiple Acrobat/Reader tracks; ensure detection/patching covers all listed version branches, not just the DC track. ↗

CVSS provenance

nvd v3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd v2.0 10.0 CRITICAL AV:N/AC:L/Au:N/C:C/I:C/A:C

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