Buffer overflow in opensc (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU16731

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-16392

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to boundary error when handling responses from a TCOS Card in tcos_select_file in libopensc/card-tcos.c. A remote unauthenticated attacker can supply specially crafted smartcards, trigger memory corruption and cause the application to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

opensc (Alpine package): 0.13.0-r0 - 0.17.0-r5

CPE2.3

• cpe:2.3:o:alpine:opensc_alpine_package:0.13.0-r0:*:*:*:*:alpine_linux:*:2.7
• cpe:2.3:o:alpine:opensc_alpine_package:0.14.0-r0:*:*:*:*:alpine_linux:*:3.2
• cpe:2.3:o:alpine:opensc_alpine_package:0.15.0-r0:*:*:*:*:alpine_linux:*:3.3

External links

https://git.alpinelinux.org/aports/commit/?id=dae98cd340ff7dc76ebb8d7cf1b949c488688a77
https://git.alpinelinux.org/aports/commit/?id=8a19072c6d6a326b70858085a9dc1d29861fb3da
https://git.alpinelinux.org/aports/commit/?id=8ed91d2a9a7e8d3d7eebcf756173eb64be295118

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.