LibRaw leaf_hdr_load_raw() Function NULL Pointer Dereference Vulnerability {CVE-2018-5806}
CVE Number – CVE-2018-5806
A vulnerability in the leaf_hdr_load_raw() function of LibRaw could allow a local attacker to cause a denial of service (DoS) condition on a targeted system.The vulnerability is due to insufficient validation of user-supplied input processed by the leaf_hdr_load_raw() function, as defined in the internal/dcraw_common.cpp source code file of the affected software. An attacker could exploit this vulnerability by submitting a malicious file to the targeted system. A successful exploit could trigger a NULL pointer dereference condition and cause the affected software to crash, resulting in a DoS condition.Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.LibRaw has confirmed the vulnerability and released software updates.
Analysis
- To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.
Safeguards
- Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to access local systems.Administrators are advised to allow only privileged users to access administration or management systems.Administrators are advised to monitor critical systems.
Vendor Announcements
- LibRaw has released a git commit at the following link: commit 9f26ce37f5be86ea11bfc6831366558650b1f6ff
Fixed Software
- LibRaw has released software updates at the following link: LibRaw 0.18.8
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.