Denial of service in International Components for Unicode

1) Use-after-free

EUVDB-ID: #VU58432

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-21913

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the pkg_createWithAssemblyCode() function in the file tools/pkgdata/pkgdata.cpp. A remote attacker can trick the victim to open a specially crafted file and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

icu: 60.1 - 65.1

CPE2.3

• cpe:2.3:a:icu-project:international_components_for_unicode:60.1:*:*:*:*:*:*:*
• cpe:2.3:a:icu-project:international_components_for_unicode:60.2:*:*:*:*:*:*:*
• cpe:2.3:a:icu-project:international_components_for_unicode:60.3:*:*:*:*:*:*:*

External links

https://github.com/unicode-org/icu/pull/886
https://unicode-org.atlassian.net/browse/ICU-20850

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.