CVE Number – CVE-2016-9396
A vulnerability in the JPC_NOMINALGAIN function of JasPer could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability exists in the JPC_NOMINALGAIN function, as defined in the jpc/jpc_t1cod.c source code file of the affected software. An attacker could exploit this vulnerability by persuading a user to access a JP2 file that submits malicious input to an affected system. A successful exploit could trigger an assertion failure, which could result in a DoS condition.
Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.
The JasPer Project has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker must have local access to the targeted system or persuade a user of the system to access a JP2 file that submits malicious input to the system by using misleading language or instructions.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to use an unprivileged account when browsing the Internet.
Administrators are advised to monitor critical systems.
The JasPer Project has released an issue report at the following link: Issue #50
The JasPer Project has released a patch and software updates at the following links: jpc_cs: reject all but JPC_COX_INS and JPC_COX_RFT and JasPer 2.0.14
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.