ID CVE-2018-16741
Summary An issue was discovered in mgetty before 1.2.1. In fax/faxq-helper.c, the function do_activate() does not properly sanitize shell metacharacters to prevent command injection. It is possible to use the ||, &&, or > characters within a file created by the "faxq-helper activate <jobid>" command.
References
Vulnerable Configurations
  • Debian Linux 8.0 (Jessie)
    cpe:2.3:o:debian:debian_linux:8.0
  • Debian Linux 9.0
    cpe:2.3:o:debian:debian_linux:9.0
CVSS
Base: 7.2
Impact:
Exploitability:
CWE CWE-77
CAPEC
  • Cause Web Server Misclassification
    An attack of this type exploits a Web server's decision to take action based on filename or file extension. Because different file types are handled by different server processes, misclassification may force the Web server to take unexpected action, or expected actions in an unexpected sequence. This may cause the server to exhaust resources, supply debug or system data to the attacker, or bind an attacker to a remote process. This type of vulnerability has been found in many widely used servers including IIS, Lotus Domino, and Orion. The attacker's job in this case is straightforward, standard communication protocols and methods are used and are generally appended with malicious information at the tail end of an otherwise legitimate request. The attack payload varies, but it could be special characters like a period or simply appending a tag that has a special meaning for operations on the server side like .jsp for a java application server. The essence of this attack is that the attacker deceives the server into executing functionality based on the name of the request, i.e. login.jsp, not the contents.
  • LDAP Injection
    An attacker manipulates or crafts an LDAP query for the purpose of undermining the security of the target. Some applications use user input to create LDAP queries that are processed by an LDAP server. For example, a user might provide their username during authentication and the username might be inserted in an LDAP query during the authentication process. An attacker could use this input to inject additional commands into an LDAP query that could disclose sensitive information. For example, entering a * in the aforementioned query might return information about all users on the system. This attack is very similar to an SQL injection attack in that it manipulates a query to gather additional information or coerce a particular return value.
  • Command Delimiters
    An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or a blacklist input validation, as opposed to whitelist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or blacklist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.
  • File System Function Injection, Content Based
    An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
  • Exploiting Multiple Input Interpretation Layers
    An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.
  • Argument Injection
    An attacker changes the behavior or state of a targeted application through injecting data or command syntax through the targets use of non-validated and non-filtered arguments of exposed services or methods.
  • Manipulating Writeable Configuration Files
    Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2018-1080.NASL
    description This update for mgetty fixes the following issues : - CVE-2018-16741: The function do_activate() did not properly sanitize shell metacharacters to prevent command injection (bsc#1108752). - CVE-2018-16745: The mail_to parameter was not sanitized, leading to a buffer overflow if long untrusted input reached it (bsc#1108756). - CVE-2018-16744: The mail_to parameter was not sanitized, leading to command injection if untrusted input reached reach it (bsc#1108757). - CVE-2018-16742: Prevent stack-based buffer overflow that could have been triggered via a command-line parameter (bsc#1108762). - CVE-2018-16743: The command-line parameter username wsa passed unsanitized to strcpy(), which could have caused a stack-based buffer overflow (bsc#1108761). This update was imported from the SUSE:SLE-15:Update update project.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 117855
    published 2018-10-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=117855
    title openSUSE Security Update : mgetty (openSUSE-2018-1080)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-4291.NASL
    description Two input sanitization failures have been found in the faxrunq and faxq binaries in mgetty, a smart modem getty replacement. An attacker could leverage them to insert commands via shell metacharacters in jobs id and have them executed with the privilege of the faxrunq/faxq user.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 117436
    published 2018-09-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=117436
    title Debian DSA-4291-1 : mgetty - security update
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-2979-1.NASL
    description This update for mgetty fixes the following security issues : CVE-2018-16741: The function do_activate() did not properly sanitize shell metacharacters to prevent command injection (bsc#1108752) CVE-2018-16745: The mail_to parameter was not sanitized, leading to a buffer overflow if long untrusted input reached it (bsc#1108756) CVE-2018-16744: The mail_to parameter was not sanitized, leading to command injection if untrusted input reached reach it (bsc#1108757) CVE-2018-16742: Prevent stack-based buffer overflow that could have been triggered via a command-line parameter (bsc#1108762) CVE-2018-16743: The command-line parameter username wsa passed unsanitized to strcpy(), which could have caused a stack-based buffer overflow (bsc#1108761) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 117903
    published 2018-10-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=117903
    title SUSE SLED12 / SLES12 Security Update : mgetty (SUSE-SU-2018:2979-1)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2018-1144.NASL
    description This update for mgetty fixes the following issues : - CVE-2018-16741: Fixed a command injection in fax/faxq-helper.c (boo#1108752) - CVE-2018-16742: Stack-based buffer overflow in contrib/scrts.c triggered via command line parameter (boo#1108762) - CVE-2018-16743: Stack-based buffer overflow with long username in contrib/next-login/login.c (boo#1108761) - CVE-2018-16744: Command injection in faxrec.c (boo#1108757) - CVE-2018-16745: Stack-based buffer overflow in fax_notify_mail() in faxrec.c (boo#1108756) - sets maximum length of a string to prevent buffer overflow and thus possible command injection - The obsolete contrib/scrts.c tool was deleted, which contained a buffer overflow.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 118110
    published 2018-10-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118110
    title openSUSE Security Update : mgetty (openSUSE-2018-1144)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-1502.NASL
    description Two input sanitization failures have been found in the faxrunq and faxq binaries in mgetty. An attacker could leverage them to insert commands via shell metacharacters in jobs id and have them executed with the privilege of the faxrunq/faxq user. For Debian 8 'Jessie', this problem has been fixed in version 1.1.36-2.1+deb8u1. We recommend that you upgrade your mgetty packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 117434
    published 2018-09-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=117434
    title Debian DLA-1502-1 : mgetty security update
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-2850-1.NASL
    description This update for mgetty fixes the following issues : CVE-2018-16741: The function do_activate() did not properly sanitize shell metacharacters to prevent command injection (bsc#1108752) CVE-2018-16745: The mail_to parameter was not sanitized, leading to a buffer overflow if long untrusted input reached it (bsc#1108756) CVE-2018-16744: The mail_to parameter was not sanitized, leading to command injection if untrusted input reached reach it (bsc#1108757) CVE-2018-16742: Prevent stack-based buffer overflow that could have been triggered via a command-line parameter (bsc#1108762) CVE-2018-16743: The command-line parameter username wsa passed unsanitized to strcpy(), which could have caused a stack-based buffer overflow (bsc#1108761) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2018-11-03
    modified 2018-11-02
    plugin id 117799
    published 2018-09-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=117799
    title SUSE SLES11 Security Update : mgetty (SUSE-SU-2018:2850-1)
refmap via4
debian DSA-4291
misc https://www.x41-dsec.de/lab/advisories/x41-2018-007-mgetty
mlist [debian-lts-announce] 20180912 [SECURITY] [DLA 1502-1] mgetty security update
Last major update 13-09-2018 - 12:29
Published 13-09-2018 - 12:29
Last modified 01-11-2018 - 13:08
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