Remote code execution in OpenEXR

Published: 2021-06-27 | Updated: 2021-07-03

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3598 CVE-2021-3605
CWE-ID	CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	OpenEXR Client/Desktop applications / Multimedia software
Vendor	OpenEXR

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU54399

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-3598

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the readChars() function in ImfIO.h. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenEXR: 3.0.0 beta - 3.0.4

CPE2.3

External links

https://github.com/AcademySoftwareFoundation/openexr/commit/566f5241edd87445373885d5f7a904dc81e866c1
https://github.com/AcademySoftwareFoundation/openexr/pull/1037

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

EUVDB-ID: #VU54398