#VU49491 Integer overflow in apt (Debian package) - CVE-2020-27350

Vulnerability identifier: #VU49491

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27350

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
apt (Debian package)
Operating systems & Components / Operating system package or component

Vendor: Debian

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow while parsing .deb packages in files apt-pkg/contrib/extracttar.cc, apt-pkg/deb/debfile.cc, and apt-pkg/contrib/arfile.cc. A local user can pass specially crafted file to the application, trigger integer overflow and execute arbitrary code on the target system with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

apt (Debian package): before 1.8.2.2

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External links
https://bugs.launchpad.net/bugs/1899193
https://security.netapp.com/advisory/ntap-20210108-0005/
https://usn.ubuntu.com/usn/usn-4667-1
https://www.debian.org/security/2020/dsa-4808

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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