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Ubuntu 20.04 LTS: USN-7346-3 critical: opensc authentication issues

ubuntu
Calendar Grey April 10, 2025
Dist Ubuntu Esm H88
A new patch has been released to solve challenges in OpenSC affecting smartcard logins on Debian platforms.
USN-7346-1 introduced a regression in OpenSC.

Summary

USN-7346-1 introduced a regression in OpenSC.

Software Description:

- opensc: Smart card utilities with support for PKCS#15 compatible cards

Details:

USN-7346-1 fixed vulnerabilities in OpenSC. The update introduced a

regression which broke smartcard based authentication. This update fixes

the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that OpenSC did not correctly handle certain memory

 operations, which could lead to a use-after-free vulnerability. An

 attacker could possibly use this issue to cause a denial of service or

 execute arbitrary code. This issue only affected Ubuntu 16.04 LTS,

 Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-42780)

 It was discovered that OpenSC did not correctly handle certain memory

 operations, which could lead to a stack buffer overflow. An attacker

 could possibly use this issue to cause a denial of service or execute

 arbitrary code. This issue onl...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory buffer overflow DoS Ubuntu use-after-free OpenSC

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS
   opensc                          0.20.0-3ubuntu0.1~esm4
                                   Available with Ubuntu Pro
   opensc-pkcs11                   0.20.0-3ubuntu0.1~esm4
                                   Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-7346-3

  https://ubuntu.com/security/notices/USN-7346-2

  https://ubuntu.com/security/notices/USN-7346-1

  CVE-2021-42780, CVE-2021-42782, CVE-2023-2977, CVE-2023-40660,

  CVE-2023-40661, CVE-2024-45615, CVE-2024-45616, CVE-2024-45617,

  CVE-2024-45618, CVE-2024-45620, CVE-2024-8443,

https://bugs.launchpad.net/ubuntu/+source/opensc/+bug/2104948

Severity
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Ubuntu Security Notice USN-7346-3

Topics%20covered

Topics Covered

security advisory buffer overflow DoS Ubuntu use-after-free OpenSC

Package Information

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