Denial of service in Info-ZIP UnZip

1) Resource exhaustion

EUVDB-ID: #VU29255

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-2019-13232

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 application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack via a specially crafted zip file.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

UnZip: 5.2 - 6.10 b

CPE2.3

• cpe:2.3:a:info-zip:unzip:5.2:*:*:*:*:*:*:*
• cpe:2.3:a:info-zip:unzip:5.3:*:*:*:*:*:*:*
• cpe:2.3:a:info-zip:unzip:5.31:*:*:*:*:*:*:*

External links

https://github.com/madler/unzip
https://lists.debian.org/debian-lts-announce/2019/07/msg00005.html
https://lists.debian.org/debian-lts-announce/2019/07/msg00027.html
https://security.gentoo.org/glsa/202003-58
https://security.netapp.com/advisory/ntap-20190814-0002/
https://support.f5.com/csp/article/K80311892?utm_source=f5support&utm_medium=RSS
https://www.bamsoftware.com/hacks/zipbomb/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.