tcpdump up to 4.6.2 AODV Decoder memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in tcpdump. The impacted element is an unknown function of the component AODV Decoder. Executing a manipulation can lead to memory corruption. This vulnerability appears as CVE-2014-8769. In addition, an exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in tcpdump (Packet Analyzer Software). It has been declared as problematic. This vulnerability affects an unknown part of the component AODV Decoder. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability.

The bug was discovered 11/08/2014. The weakness was presented 11/17/2014 by Steffen Bauch as confirmed posting (Bugtraq). The advisory is available at archives.neohapsis.com. This vulnerability was named CVE-2014-8769 since 11/13/2014. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

The application decoder for the Ad hoc On-Demand Distance Vector (AODV) protocol fails to perform input validation and performs unsafe out-of-bound accesses. The application will usually not crash, but perform out-of-bounds accesses and output/leak larger amounts of invalid data, which might lead to dropped packets. It is unknown if other payload exists that might trigger segfaults.

A public exploit has been developed by Steffen Bauch in Python and been published immediately after the advisory. It is possible to download the exploit at archives.neohapsis.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 81921 (AIX 6.1 TL 8 : tcpdump (IV68950)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195695 (Ubuntu Security Notification for Tcpdump Vulnerabilities (USN-2433-1)). The code used by the exploit is:

#!/usr/bin/env python 
from socket import socket, AF_PACKET, SOCK_RAW 
s = socket(AF_PACKET, SOCK_RAW) 
s.bind(("lo", 0)) 
aovd_frame = 
"\x00\x00\x00\x00\x00\x00\x00\x00\x8c\x7a\xdf\x6f\x08\x00\x45\x00\xe6\x3d\xf3\x7f\x40\x00\x40\x11\x30\xc6\x0a\x01\x01\x68\x0a\x02\x02\x02\x02\x8e\x0d\x00\x4b\x00\x00\xe8\x12\x00\x00\x00\x00\x1f\xc6\x51\x35\x97\x00\x24\x8c\x7a\xdf\x6f\x08\x00\x45\x00\xe6\x3d\xf3\x7f\x40\x00\x40\x11\x30\xc6\x0a\x01\x01"
s.send(aovd_frame)

Upgrading to version 4.7.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (98764), Tenable (81921), SecurityFocus (BID 71153†), SecurityTracker (ID 1031235†) and Vulnerability Center (SBV-52171†). See VDB-68219, VDB-68220 and VDB-68341 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Steffen Bauch
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 81921
Nessus Name: AIX 6.1 TL 8 : tcpdump (IV68950)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703086
OpenVAS Name: Debian Security Advisory DSA 3086-1 (tcpdump - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: tcpdump 4.7.0

Timelineinfo

11/08/2014 🔍
11/11/2014 +3 days 🔍
11/12/2014 +1 days 🔍
11/13/2014 +1 days 🔍
11/17/2014 +4 days 🔍
11/17/2014 +0 days 🔍
11/18/2014 +1 days 🔍
11/18/2014 +0 days 🔍
11/18/2014 +0 days 🔍
11/19/2014 +1 days 🔍
11/20/2014 +1 days 🔍
03/19/2015 +119 days 🔍
08/18/2015 +152 days 🔍
02/24/2022 +2382 days 🔍

Sourcesinfo

Product: tcpdump.org

Advisory: USN-2433-1
Researcher: Steffen Bauch
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-8769 (🔍)
GCVE (CVE): GCVE-0-2014-8769
GCVE (VulDB): GCVE-100-68218

OVAL: 🔍

X-Force: 98764 - tcpdump AODV denial of service, Medium Risk
SecurityFocus: 71153 - tcpdump CVE-2014-8769 Out-of-bounds Memory Access Vulnerability
SecurityTracker: 1031235 - Tcpdump Multiple Flaws Let Remote Users Deny Service
Vulnerability Center: 52171 - RedHat tcpdump 3.9.6 Through 4.6.2 Remote Denial-of Service and Information Disclosure via a Crafted Vectorframe, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/19/2014 10:33
Updated: 02/24/2022 22:54
Changes: 11/19/2014 10:33 (89), 10/24/2017 09:39 (7), 02/24/2022 22:44 (4), 02/24/2022 22:54 (1)
Complete: 🔍
Cache ID: 216:678:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!