Vulnerabilities > CVE-2012-1184 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Digium Asterisk
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Stack-based buffer overflow in the ast_parse_digest function in main/utils.c in Asterisk 1.8.x before 1.8.10.1 and 10.x before 10.2.1 allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long string in an HTTP Digest Authentication header.
Vulnerable Configurations
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.
Exploit-Db
| description | Asterisk 'ast_parse_digest()' Stack Buffer Overflow Vulnerability. CVE-2012-1184. Dos exploit for linux platform |
| id | EDB-ID:18855 |
| last seen | 2016-02-02 |
| modified | 2012-03-15 |
| published | 2012-03-15 |
| reporter | Russell Bryant |
| source | https://www.exploit-db.com/download/18855/ |
| title | Asterisk 'ast_parse_digest' Stack Buffer Overflow Vulnerability |
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2012-6704.NASL description The Asterisk Development Team has announced security releases for Asterisk 1.6.2, 1.8, and 10. The available security releases are released as versions 1.6.2.24, 1.8.11.1, and 10.3.1. These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/releases The release of Asterisk 1.6.2.24, 1.8.11.1, and 10.3.1 resolve the following two issues : - A permission escalation vulnerability in Asterisk Manager Interface. This would potentially allow remote authenticated users the ability to execute commands on the system shell with the privileges of the user running the Asterisk application. - A heap overflow vulnerability in the Skinny Channel driver. The keypad button message event failed to check the length of a fixed length buffer before appending a received digit to the end of that buffer. A remote authenticated user could send sufficient keypad button message events that the buffer would be overrun. In addition, the release of Asterisk 1.8.11.1 and 10.3.1 resolve the following issue : - A remote crash vulnerability in the SIP channel driver when processing UPDATE requests. If a SIP UPDATE request was received indicating a connected line update after a channel was terminated but before the final destruction of the associated SIP dialog, Asterisk would attempt a connected line update on a non-existing channel, causing a crash. These issues and their resolution are described in the security advisories. For more information about the details of these vulnerabilities, please read security advisories AST-2012-004, AST-2012-005, and AST-2012-006, which were released at the same time as this announcement. For a full list of changes in the current releases, please see the ChangeLogs : http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-1.6.2.24 http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-1.8.11.1 http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-10.3.1 The security advisories are available at : - http://downloads.asterisk.org/pub/security/AST-2012-004. pdf - http://downloads.asterisk.org/pub/security/AST-2012-00 5.pdf - http://downloads.asterisk.org/pub/security/AST-2012-00 6.pdf Update to 1.8.11.0 Update to 1.8.10.1, which fixes 2 security vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-05-07 plugin id 59002 published 2012-05-07 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/59002 title Fedora 17 : asterisk-10.3.1-1.fc17 (2012-6704) NASL family Fedora Local Security Checks NASL id FEDORA_2012-4230.NASL description Update to 10.2.1, which fixes 2 security vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-04-12 plugin id 58691 published 2012-04-12 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58691 title Fedora 17 : asterisk-10.2.1-1.fc17 (2012-4230) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201203-21.NASL description The remote host is affected by the vulnerability described in GLSA-201203-21 (Asterisk: Multiple vulnerabilities) Two vulnerabilities have been found in Asterisk: The last seen 2020-06-01 modified 2020-06-02 plugin id 59613 published 2012-06-21 reporter This script is Copyright (C) 2012-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/59613 title GLSA-201203-21 : Asterisk: Multiple vulnerabilities NASL family Fedora Local Security Checks NASL id FEDORA_2012-4259.NASL description Update to 1.8.10.1, which fixes 2 security vulnerabilities. The Asterisk Development Team has announced security releases for Asterisk 1.4, 1.6.2 and 1.8. The available security releases are released as versions 1.4.43, 1.6.2.21 and 1.8.7.2. These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/releases The release of Asterisk versions 1.4.43, 1.6.2.21, and 1.8.7.2 resolves an issue with possible remote enumeration of SIP endpoints with differing NAT settings. The release of Asterisk versions 1.6.2.21 and 1.8.7.2 resolves a remote crash possibility with SIP when the last seen 2020-03-17 modified 2012-04-02 plugin id 58549 published 2012-04-02 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/58549 title Fedora 15 : asterisk-1.8.10.1-1.fc15 (2012-4259) NASL family Fedora Local Security Checks NASL id FEDORA_2012-4318.NASL description Update to 1.8.10.1, which fixes 2 security vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-04-02 plugin id 58550 published 2012-04-02 reporter This script is Copyright (C) 2012-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58550 title Fedora 16 : asterisk-1.8.10.1-1.fc16 (2012-4318) NASL family Fedora Local Security Checks NASL id FEDORA_2012-6612.NASL description The Asterisk Development Team has announced security releases for Asterisk 1.6.2, 1.8, and 10. The available security releases are released as versions 1.6.2.24, 1.8.11.1, and 10.3.1. These releases are available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/releases The release of Asterisk 1.6.2.24, 1.8.11.1, and 10.3.1 resolve the following two issues : - A permission escalation vulnerability in Asterisk Manager Interface. This would potentially allow remote authenticated users the ability to execute commands on the system shell with the privileges of the user running the Asterisk application. - A heap overflow vulnerability in the Skinny Channel driver. The keypad button message event failed to check the length of a fixed length buffer before appending a received digit to the end of that buffer. A remote authenticated user could send sufficient keypad button message events that the buffer would be overrun. In addition, the release of Asterisk 1.8.11.1 and 10.3.1 resolve the following issue : - A remote crash vulnerability in the SIP channel driver when processing UPDATE requests. If a SIP UPDATE request was received indicating a connected line update after a channel was terminated but before the final destruction of the associated SIP dialog, Asterisk would attempt a connected line update on a non-existing channel, causing a crash. These issues and their resolution are described in the security advisories. For more information about the details of these vulnerabilities, please read security advisories AST-2012-004, AST-2012-005, and AST-2012-006, which were released at the same time as this announcement. For a full list of changes in the current releases, please see the ChangeLogs : http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-1.6.2.24 http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-1.8.11.1 http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLo g-10.3.1 The security advisories are available at : - http://downloads.asterisk.org/pub/security/AST-2012-004. pdf - http://downloads.asterisk.org/pub/security/AST-2012-00 5.pdf - http://downloads.asterisk.org/pub/security/AST-2012-00 6.pdf Update to 1.8.11.0 Update to 1.8.10.1, which fixes 2 security vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2012-05-04 plugin id 58981 published 2012-05-04 reporter This script is Copyright (C) 2012-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/58981 title Fedora 16 : asterisk-1.8.11.1-1.fc16 (2012-6612) NASL family Misc. NASL id ASTERISK_AST_2012_003.NASL description According to the version in its SIP banner, the version of Asterisk running on the remote host is potentially affected by a vulnerability that could allow a remote attacker to crash the server, or possibly inject arbitrary code by sending an arbitrarily long string value for HTTP Digest Authentication. last seen 2020-06-01 modified 2020-06-02 plugin id 58433 published 2012-03-22 reporter This script is Copyright (C) 2012-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/58433 title Asterisk ast_parse_digest Function HTTP Digest Authentication String Parsing Remote Overflow (AST-2012-003)
References
- http://downloads.asterisk.org/pub/security/AST-2012-003.pdf
- http://downloads.asterisk.org/pub/security/AST-2012-003-1.8.diff
- http://osvdb.org/80126
- http://secunia.com/advisories/48417
- http://www.asterisk.org/node/51797
- http://www.openwall.com/lists/oss-security/2012/03/16/10
- http://www.openwall.com/lists/oss-security/2012/03/16/17
- http://www.securitytracker.com/id?1026813
- https://exchange.xforce.ibmcloud.com/vulnerabilities/74083