FreeBSD update for OpenSSL



Published: 2021-08-25 | Updated: 2022-01-10
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-3711
CVE-2021-3712
CWE-ID CWE-119
CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
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FreeBSD
Operating systems & Components / Operating system

Vendor FreeBSD Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU56063

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-3711

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in EVP_PKEY_decrypt() function within implementation of the SM2 decryption. A remote attacker can send specially crafted SM2 content for decryption to trigger a buffer overflow by 62 bytes and execute arbitrary code on the target system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.0


CPE2.3 External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-21:16.openssl.asc

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Out-of-bounds read

EUVDB-ID: #VU56064

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-3712

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing ASN.1 strings related to a confusion with NULL termination of strings in array. A remote attacker can pass specially crafted data to the application to trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FreeBSD: 12.0 - 13.0


CPE2.3 External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-21:16.openssl.asc

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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