tcpdump up to 4.7.3 print-wb.c ah_print input validation

Summaryinfo

A vulnerability has been found in tcpdump up to 4.7.3 and classified as problematic. This vulnerability affects the function ah_print of the file print-wb.c. Performing a manipulation results in input validation. This vulnerability is reported as CVE-2015-3138. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in tcpdump up to 4.7.3 (Packet Analyzer Software). It has been classified as problematic. This affects the function ah_print of the file print-wb.c. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

print-wb.c in tcpdump before 4.7.4 allows remote attackers to cause a denial of service (segmentation fault and process crash).

The bug was discovered 04/16/2015. The weakness was disclosed 09/28/2017 (Website). It is possible to read the advisory at lists.opensuse.org. This vulnerability is uniquely identified as CVE-2015-3138 since 04/09/2015. 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 753 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100040 (openSUSE Security Update : tcpdump / libpcap (openSUSE-2017-557)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169952 (SUSE Enterprise Linux Security Update for tcpdump, libpcap (SUSE-SU-2017:1110-1)).

Upgrading to version 4.7.4 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (100040). The entries VDB-74079, VDB-74080, VDB-74082 and VDB-96107 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Packet Analyzer Software

Name

• tcpdump

Version

• 4.7.0
• 4.7.1
• 4.7.2
• 4.7.3

License

• open-source

Website

• Product: https://www.tcpdump.org/

CPE 2.3info

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CPE 2.2info

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

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