A vulnerability in the Radiotap dissector component of Wireshark could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to insufficient bound checks in the ieee80211_radiotap_iterator_next() function, as defined in the epan/dissectors/packet-ieee80211-radiotap-iter.c source code file of the affected software. An attacker could exploit this vulnerability by injecting a malformed packet into a network, to be processed by the affected application, or by convincing a targeted user to open a malicious packet trace file. A successful exploit could cause the Radiotap dissector component to crash, resulting in a DoS condition.
Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.
Wireshark confirmed the vulnerability and released software updates.
To exploit the vulnerability, the attacker may use misleading language and instructions to convince a user to open a malicious packet trace file. To inject malformed packets that the Wireshark application may attempt to parse, the attacker may need access to the trusted, internal network where the targeted system resides. This access requirement may reduce the likelihood of a successful exploit.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.