#VU308 Out-of-bounds read in OpenSSL - CVE-2016-2180

Vulnerability identifier: #VU308

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2180

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the TS_OBJ_print_bio() function in crypto/ts/ts_lib.c in the X.509 Public Key Infrastructure Time-Stamp Protocol (TSP) implementation in OpenSSL. A remote attacker can perform a denial of service (DoS) attack via a crafted time-stamp file that is mishandled by the "openssl ts" command.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.2c - 1.0.2

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External links
https://github.com/openssl/openssl/commit/0ed26acce328ec16a3aa635f1ca37365e8c7403a
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2180

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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.