CVE Vulnerabilities

CVE-2016-10074

Improper Neutralization of Special Elements used in a Command ('Command Injection')

Published: Dec 30, 2016 | Modified: Nov 04, 2017
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

The mail transport (aka Swift_Transport_MailTransport) in Swift Mailer before 5.4.5 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a (backslash double quote) in a crafted e-mail address in the (1) From, (2) ReturnPath, or (3) Sender header.

Weakness

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Affected Software

Name Vendor Start Version End Version
Swiftmailer Swiftmailer * 5.4.4 (including)
Libphp-swiftmailer Ubuntu artful *
Libphp-swiftmailer Ubuntu bionic *
Libphp-swiftmailer Ubuntu cosmic *
Libphp-swiftmailer Ubuntu devel *
Libphp-swiftmailer Ubuntu disco *
Libphp-swiftmailer Ubuntu eoan *
Libphp-swiftmailer Ubuntu esm-apps/xenial *
Libphp-swiftmailer Ubuntu focal *
Libphp-swiftmailer Ubuntu groovy *
Libphp-swiftmailer Ubuntu hirsute *
Libphp-swiftmailer Ubuntu impish *
Libphp-swiftmailer Ubuntu jammy *
Libphp-swiftmailer Ubuntu kinetic *
Libphp-swiftmailer Ubuntu lunar *
Libphp-swiftmailer Ubuntu mantic *
Libphp-swiftmailer Ubuntu noble *
Libphp-swiftmailer Ubuntu oracular *
Libphp-swiftmailer Ubuntu precise *
Libphp-swiftmailer Ubuntu trusty *
Libphp-swiftmailer Ubuntu upstream *
Libphp-swiftmailer Ubuntu xenial *
Libphp-swiftmailer Ubuntu yakkety *
Libphp-swiftmailer Ubuntu zesty *

Extended Description

Command injection vulnerabilities typically occur when:

Many protocols and products have their own custom command language. While OS or shell command strings are frequently discovered and targeted, developers may not realize that these other command languages might also be vulnerable to attacks. Command injection is a common problem with wrapper programs.

Potential Mitigations

  • Assume all input is malicious. Use an “accept known good” input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, “boat” may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as “red” or “blue.”
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code’s environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.

References