Out-of-bounds read in OpenSC - CVE-2019-15946
Published: December 30, 2019
Vulnerability identifier: #VU23844
CSH Severity: Low
CVSS v4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-15946
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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 Octet string within the asn1_decode_entry() function in libopensc/asn1.c. A local user can supply specially crafted data to the application, trigger out-of-bounds read error and read contents of memory on the system.
Affected software
OpenSC
Arch Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Server for SAP
Fedora
opensc (Alpine package)
opensc
opensc-debuginfo
opensc-debugsource
opensc (Red Hat package)
Arch Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Server for SAP
Fedora
opensc (Alpine package)
opensc
opensc-debuginfo
opensc-debugsource
opensc (Red Hat package)
How to mitigate CVE-2019-15946
Install updates from vendor's website.
OpenSC - update to 0.20.0
opensc (Alpine package) - update to 0.20.0-r0
opensc - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc-debuginfo - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc-debugsource - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc (Red Hat package) - update to 0.20.0-2.el8
opensc - update to 0.20.0-3.fc31
opensc (Alpine package) - update to 0.20.0-r0
opensc - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc-debuginfo - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc-debugsource - addressed in versions 0.13.0-3.11.1, 0.18.0-150000.3.23.1, 0.19.0-3.7.1
opensc (Red Hat package) - update to 0.20.0-2.el8
opensc - update to 0.20.0-3.fc31