#VU23845 Out-of-bounds read in OpenSC - CVE-2019-15945
Vulnerability identifier: #VU23845
Vulnerability risk: Low
CVSSv4.0: 0.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2019-15945
CWE-ID:
CWE-125
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
OpenSC
Universal components / Libraries /
Libraries used by multiple products
Vendor: OpenSC
Description
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing ASN.1 Bitstring within the decode_bit_string() function in libopensc/asn1.c. A local user can pass specially crafted data to the application, trigger out-of-bounds read error and read contents of memory on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
OpenSC: 0.4.0 - 0.19.0
External links
https://github.com/OpenSC/OpenSC/commit/412a6142c27a5973c61ba540e33cdc22d5608e68
https://github.com/OpenSC/OpenSC/compare/f1691fc...12218d4
https://lists.debian.org/debian-lts-announce/2019/09/msg00009.html
https://github.com/OpenSC/OpenSC/releases/tag/0.20.0
Q & A
Can this vulnerability be exploited remotely?
No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
