Denial of service in Rubyzip library

1) Resource exhaustion

EUVDB-ID: #VU25104

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16892

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to the data about the uncompressed size can be spoofed. A remote attacker can send a specially crafted ZIP file, bypass application checks on ZIP entry sizes, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Rubyzip: 0.9.5 - 1.2.4

External links

http://github.com/rubyzip/rubyzip/pull/403
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J45KSFPP6DFVWLC7Z73L7SX735CKZYO6/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWWPORMSBHZTMP4PGF4DQD22TTKBQMMC/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X255K6ZBAQC462PQN2ND5HOTTQEJ2G2X/

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.