tcpflow up to 1.5.0-alpha wifipcap/wifipcap.cpp handle_80211 caplen out-of-bounds

Summaryinfo

A vulnerability was found in tcpflow up to 1.5.0-alpha. It has been rated as critical. This affects the function handle_80211 of the file wifipcap/wifipcap.cpp. Performing a manipulation of the argument caplen results in out-of-bounds. This vulnerability is cataloged as CVE-2018-14938. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in tcpflow up to 1.5.0-alpha. This affects the function handle_80211 of the file wifipcap/wifipcap.cpp. The manipulation of the argument caplen with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in wifipcap/wifipcap.cpp in TCPFLOW through 1.5.0-alpha. There is an integer overflow in the function handle_prism during caplen processing. If the caplen is less than 144, one can cause an integer overflow in the function handle_80211, which will result in an out-of-bounds read and may allow access to sensitive memory (or a denial of service).

The bug was discovered 08/02/2018. The weakness was shared 08/05/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-14938 since 08/04/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 117299 (Fedora 27 : tcpflow (2018-4f0b7d1251)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197438 (Ubuntu Security Notification for Tcpflow Vulnerabilities (USN-3955-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117299). The entry VDB-125686 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• tcpflow

Version

• 1.5.0-alpha

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion