CVE-2020-26572: The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher

Medium severity · published Oct 6, 2020

CVE-2020-26572

The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher

5.5

CVSS

0.4%

EPSS

On KEV

Description

The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 32% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

9.0 · source: NVD

Fedora · Fedoraproject

33 · source: NVD

Opensc · Opensc Project

through 0.20.0 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-26572

CVE.org

https://www.cve.org/CVERecord?id=CVE-2020-26572

Mailing List

http://www.openwall.com/lists/oss-security/2020/11/24/4

Third Party Advisory

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22967

Patch

https://github.com/OpenSC/OpenSC/commit/9d294de90d1cc66956389856e60b6944b27b4817

Mailing List

https://lists.debian.org/debian-lts-announce/2021/11/msg00027.html

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXOHFDMNMO6IDECAGUTB3SJGAGXVRT6S/