Multiple vulnerabilities in 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
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strongSwan
Server applications / Encryption software

Vendor strongswan.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU57554

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41990

CWE-ID: CWE-190 - Integer Overflow or Wraparound

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

Install updates from vendor's website.

Vulnerable software versions

strongSwan: 5.0.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.3.5, 5.4.0, 5.5.0, 5.5.1, 5.5.2, 5.5.3, 5.6.0, 5.6.1, 5.6.2, 5.6.3, 5.7.0, 5.7.1, 5.7.2, 5.8.0, 5.8.1, 5.8.2, 5.8.3, 5.8.4, 5.9.0, 5.9.1, 5.9.2, 5.9.3

CPE2.3 External links

http://github.com/strongswan/strongswan/releases/tag/5.9.4
http://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-(cve-2021-41990).html
http://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

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41991

CWE-ID: CWE-190 - Integer Overflow or Wraparound

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 multiple requests with different certificates. A remote attacker can send 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

Install updates from vendor's website.

Vulnerable software versions

strongSwan: 5.0.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.3.0, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.3.5, 5.4.0, 5.5.0, 5.5.1, 5.5.2, 5.5.3, 5.6.0, 5.6.1, 5.6.2, 5.6.3, 5.7.0, 5.7.1, 5.7.2, 5.8.0, 5.8.1, 5.8.2, 5.8.3, 5.8.4, 5.9.0, 5.9.1, 5.9.2, 5.9.3

CPE2.3 External links

http://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-(cve-2021-41991).html
http://github.com/strongswan/strongswan/releases/tag/5.9.4

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.



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