openEuler update for unzip

1) NULL pointer dereference

EUVDB-ID: #VU68298

Risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/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-2021-4217

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in unzip when handling Unicode strings. A remote attacker can trick the victim to open a specially crafted archive and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

unzip-debuginfo: before 6.0-47

unzip-help: before 6.0-47

unzip-debugsource: before 6.0-47

unzip: before 6.0-47

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP3:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:22.03:LTS:*:*:*:*:*:*
• cpe:2.3:o:openeuler:unzip-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:unzip-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:unzip-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:unzip:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1902

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.