cbcvebase.
CVE-2018-4990
published 2018-07-09

CVE-2018-4990: Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free vulnerability…

PriorityP181high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
KEVITW
CISA Known Exploited Vulnerabilitydue 2022-06-22
Exploited in the wild
EPSS
40.54%
98.5th percentile
Adobe Acrobat and Reader versions 2018.011.20038 and earlier, 2017.011.30079 and earlier, and 2015.006.30417 and earlier have a Double Free vulnerability. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Affected

6 ranges
VendorProductVersion rangeFixed in
adobeacrobat_dc15.006.30060 – 15.006.30417
adobeacrobat_dc15.008.20082 – 18.011.20038
adobeacrobat_dc17.011.30059 – 17.011.30079
adobeacrobat_reader_dc15.006.30060 – 15.006.30417
adobeacrobat_reader_dc15.008.20082 – 18.011.20038
adobeacrobat_reader_dc17.011.30059 – 17.011.30079

Detection & IOCsextracted from sources · hover to see the quote

hash4b672deae5c1231ea20ea70b0bf091164ef0b939e2cf4d142d31916a169e8e01
hashc319913bd07365503ee5925ac93b20967f5531b49f392b99d7e3619ae4d06477
  • Detect NULL page memory allocation originating from AcroRd32 — used in this exploit to allocate a fake data structure at the NULL page.
  • Detect embedded JavaScript within a PDF that sets up a ROP chain leading to shellcode execution — the first phase of the CVE-2018-4990 exploit.
  • The malicious PDF sample was uploaded to VirusTotal while still in development; hunting for the SHA256 hashes on VT or sandboxes is a viable detection approach.
  • ·CVE-2018-4990 requires chaining with CVE-2018-8120 (Win32k EoP / null pointer dereference) to achieve full sandbox escape and SYSTEM-level code execution; neither vulnerability alone achieves complete compromise.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
vulncheck8.8HIGH
cisa8.8HIGH
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