Debian update for strongswan

Published: 2021-10-19

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-41990 CVE-2021-41991
CWE-ID	CWE-190
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	strongswan (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU57554

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-41990

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when processing a crafted certificate with an RSASSA-PSS signature. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

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

Mitigation

Update strongswan package to one of the following versions: 5.7.2-1+deb10u1, 5.9.1-1+deb11u1.

Vulnerable software versions

strongswan (Debian package): 5.7.0-1 - 5.9.1-1

CPE2.3

External links

https://www.debian.org/security/2021/dsa-4989

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.

2) Integer overflow

EUVDB-ID: #VU57553