Heap-based buffer overflow in OpenSC



| Updated: 2020-11-27
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-26570
CWE-ID CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 OpenSC
Universal components / Libraries / Libraries used by multiple products

Vendor OpenSC

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU48687

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-26570

CWE-ID: CWE-122 - Heap-based Buffer Overflow

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 within the sc_oberthur_read_file. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger heap-based buffer overflow 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

OpenSC: 0.20.0 rc1 - 0.20.0

CPE2.3 External links

https://www.openwall.com/lists/oss-security/2020/11/24/4
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24316
https://github.com/OpenSC/OpenSC/commit/6903aebfddc466d966c7b865fae34572bf3ed23e


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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