SB2026060567 - openEuler 24.03 LTS SP1 update for opensc
Published: June 5, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2025-49010)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an attacker with physical access to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to a stack-based buffer overflow write in the GET RESPONSE handling in libopensc when processing specially crafted responses to APDU requests from a crafted USB device or smart card. An attacker with physical access can present a crafted USB device or smart card to trigger the overflow and disclose sensitive information, modify data, or cause a denial of service.
User interaction is required while a user or administrator is using a token, and the issue is considered high complexity.
2) Out-of-bounds read (CVE-ID: CVE-2025-66037)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an attacker with physical access to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to out-of-bounds read in sc_pkcs15_pubkey_from_spki_fields() in the X.509/SPKI handling path when parsing malformed X.509 certificate or SPKI data via the PIV/PKCS#15 reader path. An attacker with physical access can feed specially crafted certificate data to trigger an out-of-bounds heap read and disclose sensitive information, modify data, or cause a denial of service.
The issue occurs when a zero-length buffer is allocated and one byte is read past the end of that allocation. It is reachable through the shared certificate and public-key decoding logic, including the fuzz_pkcs15_reader and fuzz_pkcs15_crypt harnesses, and was observed as undefined behavior in a non-sanitized build under Valgrind.
Remediation
Install update from vendor's website.