elfutils libdwfl Library Denial of Service Vulnerability [CVE-2018-18310]

CVE Number – CVE-2018-18310

A vulnerability in the libdwfl library of elfutils could allow a local attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability exists in the dwfl_segment_report_module.c source code file in the libdwfl library of the affected software and is due to improper handling of Executable and Linkable Format (ELF) files. An attacker could exploit this vulnerability by sending an ELF file that submits malicious input to the targeted system and by executing the eu-stack command. A successful exploit could trigger a segmentation fault and cause the affected application to crash, resulting in a DoS condition.

Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.

elfutils has confirmed the vulnerability; however, software updates are not available.

Analysis
  • To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.

    At the time this alert was first published, a proposed patch was available in the archives of the [email protected] mailing list for the elfutils project.

Safeguards
  • Administrators are advised to contact the vendor regarding future updates and releases.

    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
  • elfutils has released a bug report at the following link: Bug 23752
Fixed Software
  • At the time this alert was first published, elfutils had not released software updates.




Duncan Newell

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.

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