CVE-2020-26572: Buffer Overflow
The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcosdecipher.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alpine/openscto a version that resolves this vulnerability.Fixed in 0.20.0-r2 - Upgrade
Upgrade
alpine/openscto a version that resolves this vulnerability.Fixed in 0.21.0-r0
Event History
Frequently Asked Questions
What is CVE-2020-26572?
CVE-2020-26572 is a vulnerability in the TCOS smart card software driver in OpenSC before 0.21.0-rc1, which allows a stack-based buffer overflow in tcos_decipher.
How does CVE-2020-26572 affect OpenSC?
CVE-2020-26572 affects OpenSC versions up to and including 0.20.0.
Which software and operating systems are affected by CVE-2020-26572?
OpenSC versions up to and including 0.20.0, Fedora 33, and Debian Linux 9.0 are affected by CVE-2020-26572.
What is the severity of CVE-2020-26572?
CVE-2020-26572 has a severity level of 5.5 (medium).
How can I fix CVE-2020-26572?
To fix CVE-2020-26572, update to OpenSC version 0.21.0-rc1 or later.