#VU34190 Use-after-free in Debian Linux - CVE-2020-15389

Vulnerability identifier: #VU34190

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15389

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system

Vendor: Debian

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

jp2/opj_decompress.c in OpenJPEG through 2.3.1 has a use-after-free that can be triggered if there is a mix of valid and invalid files in a directory operated on by the decompressor. Triggering a double-free may also be possible. This is related to calling opj_image_destroy twice.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 9.0

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External links
https://github.com/uclouvain/openjpeg/issues/1261
https://lists.debian.org/debian-lts-announce/2020/07/msg00008.html
https://pastebin.com/4sDKQ7U8

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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.