CVE-2020-6146: An exploitable code execution vulnerability exists in the rendering functionality of Nitro Pro 13.13.2.242 and 13.16.2.300. When drawing the contents of a page…

PriorityP265high8.8CVSS 3.1

AVNACLPRNUIRSUCHIHAH

EPSS

78.47%

99.5th percentile

An exploitable code execution vulnerability exists in the rendering functionality of Nitro Pro 13.13.2.242 and 13.16.2.300. When drawing the contents of a page and selecting the stroke color from an 'ICCBased' colorspace, the application will read a length from the file and use it as a loop sentinel when writing data into the member of an object. Due to the object member being a buffer of a static size allocated on the heap, this can result in a heap-based buffer overflow. A specially crafted document must be loaded by a victim in order to trigger this vulnerability.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
gonitro	nitro_pro	—	—
gonitro	nitro_pro	—	—
gonitro	nitro_pro	—	—

Detection & IOCsextracted from sources · hover to see the quote

snort↗

→CVE-2020-6146 is triggered during PDF rendering when an ICCBased colorspace is used for stroke color; the application reads an attacker-controlled length from the file and uses it as a loop sentinel to write into a fixed-size heap buffer — look for malformed PDF documents containing ICCBased colorspace stream objects with anomalously large length values. ↗
→Exploitation requires a victim to open a specially crafted PDF document; delivery vector is a malicious PDF file targeting Nitro Pro versions 13.13.2.242 and 13.16.2.300. ↗

·Snort rules listed cover the full set of Nitro Pro vulnerabilities disclosed in this advisory (CVE-2020-6112, -6113, -6115, -6116, -6146); individual rule-to-CVE mapping is not specified in the source — all rules should be enabled when defending against this advisory's vulnerability set. ↗
·Additional Snort rules may be released after publication; always consult Firepower Management Center or Snort.org for the most current rule set. ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvdv3.08.8HIGHCVSS:3.0/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

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