==========================================================================
Ubuntu Security Notice USN-7346-3
April 09, 2025

opensc vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

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 only affected Ubuntu 20.04 LTS.
  (CVE-2021-42782)

  It was discovered that OpenSC did not correctly handle the length of
  certain buffers, which could lead to a out-of-bounds access 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, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-2977)

  Deepanjan Pal discovered that OpenSC did not correctly authenticate a zero
  length PIN. A physically proximate attacker could possibly use this issue
  to gain unauthorized access to certain systems. This issue only affected
  Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-40660)

  It was discovered that OpenSC did not correctly handle certain memory
  operations. A physically proximate attacker could possibly use this issue
  to compromise key generation, certificate loading and other card
  management operations. This issue only affected Ubuntu 20.04 LTS and
  Ubuntu 22.04 LTS. (CVE-2023-40661)

  Hubert Kario, Michal Shagam and Eyal Ronen discovered that OpenSC had a
  timing side-channel and incorrectly handled RSA padding. An attacker
  could possibly use this issue to recover sensitive information. This issue
  only affected Ubuntu 22.04 LTS. (CVE-2023-5992)

  Matteo Marini discovered that OpenSC did not properly manage memory due to
  certain uninitialized variables. A physically proximate attacker could
  possibly use this issue to gain unauthorized access to certain systems.
  This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,
  Ubuntu 24.04 LTS and Ubuntu 24.10. (CVE-2024-45615)

  Matteo Marini discovered that OpenSC did not correctly handle certain
  memory operations. A physically proximate attacker could possibly use this
  issue to gain unauthorized access to certain systems. This issue only
  affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and
  Ubuntu 24.10. (CVE-2024-45616, CVE-2024-45617)

  Matteo Marini discovered that OpenSC did not correctly handle certain
  memory operations. A physically proximate attacker could possibly use this
  issue to gain unauthorized access to certain systems.
  (CVE-2024-45618, CVE-2024-45620)

  Matteo Marini discovered that OpenSC did not correctly handle certain
  memory operations. A physically proximate attacker could possibly use this
  issue to gain unauthorized access to certain systems. This issue only
  affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 24.10.
  (CVE-2024-45619)

  It was discovered that OpenSC did not correctly handle certain memory
  operations, which could lead to a buffer overflow. A physically
  proximate attacker could possibly use this issue to compromise card
  management operations during enrollment and modification. This issue only
  affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and
  Ubuntu 24.10. (CVE-2024-8443)

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