Vulnerabilities > CVE-2006-2898 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Digium Asterisk

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
digium
CWE-119
nessus
NVD
Published: 2006-06-07
Updated: 2018-10-18

Summary

The IAX2 channel driver (chan_iax2) for Asterisk 1.2.x before 1.2.9 and 1.0.x before 1.0.11 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via truncated IAX 2 (IAX2) video frames, which bypasses a length check and leads to a buffer overflow involving negative length check. NOTE: the vendor advisory claims that only a DoS is possible, but the original researcher is reliable. This vulnerability is addressed in the following product releases: Asterisk, Asterisk, 1.2.9 Asterisk, Asterisk, 1.0.11

Vulnerable Configurations

Part Description Count
Application
Digium
9

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_ASTERISK-1676.NASL
    descriptionA security problem was fixed in the IAX2 channel driver of Asterisk that could be used by remote users to execute code or at least crash Asterisk. This issue is tracked by the Mitre CVE ID CVE-2006-2898.
    last seen2020-06-01
    modified2020-06-02
    plugin id27155
    published2007-10-17
    reporterThis script is Copyright (C) 2007-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/27155
    titleopenSUSE 10 Security Update : asterisk (asterisk-1676)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200606-15.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200606-15 (Asterisk: IAX2 video frame buffer overflow) Asterisk fails to properly check the length of truncated video frames in the IAX2 channel driver which results in a buffer overflow. Impact : An attacker could exploit this vulnerability by sending a specially crafted IAX2 video stream resulting in the execution of arbitrary code with the permissions of the user running Asterisk. Workaround : Disable public IAX2 support.
    last seen2020-06-01
    modified2020-06-02
    plugin id21708
    published2006-06-16
    reporterThis script is Copyright (C) 2006-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/21708
    titleGLSA-200606-15 : Asterisk: IAX2 video frame buffer overflow
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-1126.NASL
    descriptionA problem has been discovered in the IAX2 channel driver of Asterisk, an Open Source Private Branch Exchange and telephony toolkit, which may allow a remote attacker to cause a crash of the Asterisk server.
    last seen2020-06-01
    modified2020-06-02
    plugin id22668
    published2006-10-14
    reporterThis script is Copyright (C) 2006-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/22668
    titleDebian DSA-1126-1 : asterisk - buffer overflow

References