#VU67590 Out-of-bounds write in libjpeg-turbo - CVE-2021-46822

Vulnerability identifier: #VU67590

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-46822

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libjpeg-turbo
Client/Desktop applications / Multimedia software

Vendor: The libjpeg-turbo Project

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing images within the  get_word_rgb_row() function in rdppm.c. A remote attacker can pass a specially crafted file to the affected software, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libjpeg-turbo: 2.0.0 - 2.0.90

---

External links
https://exchange.xforce.ibmcloud.com/vulnerabilities/221567
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/f35fd27ec641c42d6b115bfa595e483ec58188d2

---

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.