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Weakness (CWE)

CWE-134: Use of Externally-Controlled Format String

Base Draft

The product uses a function that accepts a format string as an argument, but the format string originates from an external source.

How to prevent it (3 mitigations)

  1. Requirements

    Choose a language that is not subject to this flaw.

  2. Implementation

    Ensure that all format string functions are passed a static string which cannot be controlled by the user, and that the proper number of arguments are always sent to that function as well. If at all possible, use functions that do not support the %n operator in format strings. [REF-116] [REF-117]

  3. Build and Compilation

    Run compilers and linkers with high warning levels, since they may detect incorrect usage.

Source: MITRE CWE-134

All Critical High Medium Low Exploited only Public exploit

2 results · Clear filters · Feed

  • Critical 9.3
    CVE-2012-10055 Public exploit

    ComSndFTP v1.3.7 Beta USER Format String RCE

    ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. By sending a specially crafted username containing format specifiers, a remote attacker can overwrite a hardcoded function pointer in memory (s…

    ComSndFTP FTP Server
  • Critical 9.8
    CVE-2024-23113 Exploited Public exploit EPSS 62%

    A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0…

    Fortinet FortiOS FortiProxy FortiPAM Network devices
    KEV Oct 9, 2024