Vulnerability identifier: #VU61671

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-25032

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zlib
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when compressing data. A remote attacker can pass specially crafted input to the application, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Zlib: 1.2.2.2 - 1.2.11

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External links
http://www.openwall.com/lists/oss-security/2022/03/24/1
http://github.com/madler/zlib/commit/5c44459c3b28a9bd3283aaceab7c615f8020c531
http://www.openwall.com/lists/oss-security/2022/03/25/2
http://www.openwall.com/lists/oss-security/2022/03/26/1

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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.