CVE-2022-22176

Severity

65%

Complexity

27%

Confidentiality

60%

An Improper Validation of Syntactic Correctness of Input vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent unauthenticated attacker sending a malformed DHCP packet to cause a crash of jdhcpd and thereby a Denial of Service (DoS). If option-82 is configured in a DHCP snooping / -security scenario, jdhcpd crashes if a specific malformed DHCP request packet is received. The DHCP functionality is impacted while jdhcpd restarts, and continued exploitation of the vulnerability will lead to the unavailability of the DHCP service and thereby a sustained DoS. This issue affects Juniper Networks Junos OS 13.2 version 13.2R1 and later versions prior to 15.1R7-S11; 18.3 versions prior to 18.3R3-S6; 18.4 versions prior to 18.4R2-S9, 18.4R3-S10; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R2-S7, 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3-S3; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2-S1, 21.1R3; 21.2 versions prior to 21.2R1-S1, 21.2R2. This issue does not affect Juniper Networks Junos OS version 12.3R12 and prior versions.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.9. CVSS Attack Vector: adjacent_network. CVSS Attack Complexity: medium. CVSS Vector: (AV:A/AC:M/Au:N/C:N/I:N/A:P).

Demo Examples

Improper Input Validation

CWE-20

This example demonstrates a shopping interaction in which the user is free to specify the quantity of items to be purchased and a total is calculated.


               
...

The user has no control over the price variable, however the code does not prevent a negative value from being specified for quantity. If an attacker were to provide a negative value, then the user would have their account credited instead of debited.

Improper Input Validation

CWE-20

This example asks the user for a height and width of an m X n game board with a maximum dimension of 100 squares.


               
.../* board dimensions */
die("No integer passed: Die evil hacker!\n");
die("No integer passed: Die evil hacker!\n");
die("Value too large: Die evil hacker!\n");

While this code checks to make sure the user cannot specify large, positive integers and consume too much memory, it does not check for negative values supplied by the user. As a result, an attacker can perform a resource consumption (CWE-400) attack against this program by specifying two, large negative values that will not overflow, resulting in a very large memory allocation (CWE-789) and possibly a system crash. Alternatively, an attacker can provide very large negative values which will cause an integer overflow (CWE-190) and unexpected behavior will follow depending on how the values are treated in the remainder of the program.

Improper Input Validation

CWE-20

The following example shows a PHP application in which the programmer attempts to display a user's birthday and homepage.


               
echo "Birthday: $birthday<br>Homepage: <a href=$homepage>click here</a>"

The programmer intended for $birthday to be in a date format and $homepage to be a valid URL. However, since the values are derived from an HTTP request, if an attacker can trick a victim into clicking a crafted URL with <script> tags providing the values for birthday and / or homepage, then the script will run on the client's browser when the web server echoes the content. Notice that even if the programmer were to defend the $birthday variable by restricting input to integers and dashes, it would still be possible for an attacker to provide a string of the form:


               
2009-01-09--

If this data were used in a SQL statement, it would treat the remainder of the statement as a comment. The comment could disable other security-related logic in the statement. In this case, encoding combined with input validation would be a more useful protection mechanism.

Furthermore, an XSS (CWE-79) attack or SQL injection (CWE-89) are just a few of the potential consequences when input validation is not used. Depending on the context of the code, CRLF Injection (CWE-93), Argument Injection (CWE-88), or Command Injection (CWE-77) may also be possible.

Improper Input Validation

CWE-20

This function attempts to extract a pair of numbers from a user-supplied string.


               
}
die("Did not specify integer value. Die evil hacker!\n");
/* proceed assuming n and m are initialized correctly */

This code attempts to extract two integer values out of a formatted, user-supplied input. However, if an attacker were to provide an input of the form:


               
123:

then only the m variable will be initialized. Subsequent use of n may result in the use of an uninitialized variable (CWE-457).

Improper Input Validation

CWE-20

The following example takes a user-supplied value to allocate an array of objects and then operates on the array.


               
}
list[0] = new Widget();
die("Negative value supplied for list size, die evil hacker!");

This example attempts to build a list from a user-specified value, and even checks to ensure a non-negative value is supplied. If, however, a 0 value is provided, the code will build an array of size 0 and then try to store a new Widget in the first location, causing an exception to be thrown.

Improper Input Validation

CWE-20

This application has registered to handle a URL when sent an intent:


               
}......
}
}
int length = URL.length();
...

The application assumes the URL will always be included in the intent. When the URL is not present, the call to getStringExtra() will return null, thus causing a null pointer exception when length() is called.

Overview

Type

Juniper

First reported 3 years ago

2022-01-19 01:15:00

Last updated 3 years ago

2022-01-26 18:51:00

Affected Software

Juniper Junos 13.2 R1

13.2

Juniper Junos 13.2 R2

13.2

Juniper Junos 13.2 R3

13.2

Juniper Junos 13.2 R4

13.2

Juniper JUNOS 13.2R5

13.2

Juniper JunOS 13.2 R6

13.2

Juniper JunOS 13.2 R7

13.2

Juniper JunOS 13.2 R7-s1

13.2

Juniper JunOS 13.2 R7-s2

13.2

Juniper Junos 13.2X51

13.2x51

Juniper JunOS 13.2x51 D15

13.2x51

Juniper Junos 13.2X51 D20

13.2x51

Juniper JUNOS 13.2x51 D20.2

13.2x51

Juniper JunOS 13.2x51 D21

13.2x51

Juniper Junos 13.2X51 D25

13.2x51

Juniper JunOS 13.2x51 D26

13.2x51

Juniper JunOS 13.2x51 D30

13.2x51

Juniper Junos 13.2X51 D35

13.2x51

Juniper JUNOS 13.2X52

13.2x52

Juniper Junos 13.2X52 D10

13.2x52

Juniper Junos 13.2X52 D15

13.2x52

Juniper Junos 13.2X52 D20

13.2x52

Juniper JunOS 13.2x52 D25

13.2x52

Juniper Junos 13.2X52 D5

13.2x52

Juniper JUNOS 13.3

13.3

Juniper Junos 13.3 R1

13.3

Juniper JUNOS 13.3 R10

13.3

Juniper Junos 13.3 R2

13.3

Juniper JUNOS 13.3R2-S2

13.3

Juniper Junos 13.3 R3

13.3

Juniper Junos 13.3 R4

13.3

Juniper Junos 13.3 R5

13.3

Juniper JUNOS 13.3 R6

13.3

Juniper Junos 13.3 R7

13.3

Juniper Junos 13.3 R8

13.3

Juniper Junos 13.3 R9

13.3

Juniper JunOS 13.3R9

13.3r9

Juniper JUNOS 14.1

14.1

Juniper JUNOS 14.1R1

14.1

Juniper Junos 14.1 R2

14.1

Juniper Junos 14.1 R3

14.1

Juniper JunOS 14.1 R4

14.1

Juniper Junos 14.1 R5

14.1

Juniper Junos 14.1 R6

14.1

Juniper Junos 14.1 R7

14.1

Juniper JunOS 14.1 R8

14.1

Juniper Junos 14.1 R8-S3

14.1

Juniper JunOS 14.1 R9

14.1

Juniper JunOS 14.1R7

14.1r7

Juniper Junos 14.1X50

14.1x50

Juniper JUNOS 14.1x50-D60

14.1x50

Juniper JUNOS 14.1X51

14.1x51

Juniper JunOS 14.1x51 D60

14.1x51

Juniper JUNOS 14.1X53

14.1x53

Juniper JunOS 14.1x53 D10

14.1x53

Juniper Junos 14.1X53 D121

14.1x53

Juniper JunOS 14.1x53 D15

14.1x53

Juniper JunOS 14.1x53 D16

14.1x53

Juniper JunOS 14.1x53 D25

14.1x53

Juniper JunOS 14.1x53 D26

14.1x53

Juniper Junos 14.1X53 D27

14.1x53

Juniper Junos 14.1X53 D30

14.1x53

Juniper Junos 14.1X53 D35

14.1x53

Juniper JunOS 14.1x53 D40

14.1x53

Juniper Junos 14.1X53 D42

14.1x53

Juniper Junos 14.1X53 D43

14.1x53

Juniper Junos 14.1X53 D44

14.1x53

Juniper JunOS 14.1X53 D45

14.1x53

Juniper JUNOS 14.1X53 D48

14.1x53

Juniper Junos 14.1X53 D50

14.1x53

Juniper JUNOS 14.1X53 D51

14.1x53

Juniper JUNOS 14.1X53 D52

14.1x53

Juniper JUNOS 14.1X53 D53

14.1x53

Juniper JunOS 14.1x53 R1

14.1x53

Juniper JUNOS 14.1X55

14.1x55

Juniper Junos 14.1X55-D16

14.1x55

Juniper Junos 14.1X55-D20

14.1x55

Juniper Junos 14.1x55-D25

14.1x55

Juniper JunOS 14.1X55 D30

14.1x55

Juniper JunOS 14.1x55 D35

14.1x55

Juniper Junos 14.2

14.2

Juniper Junos 14.2 R1

14.2

Juniper Junos 14.2 R2

14.2

Juniper Junos 14.2 R3

14.2

Juniper Junos 14.2 R4

14.2

Juniper Junos 14.2 R5

14.2

Juniper Junos 14.2 R6

14.2

Juniper JunOS 14.2 R7

14.2

Juniper Junos 14.2 R7-S6

14.2

Juniper Junos 14.2 R7-S7

14.2

Juniper JUNOS 14.2 R7-S8

14.2

Juniper Junos 14.2 R8

14.2

Juniper JunOS 14.2R6

14.2r6

Juniper Junos OS 15.1

15.1

Juniper Junos 15.1 A1

15.1

Juniper JUNOS 15.1 F

15.1

Juniper JunOS 15.1 F1

15.1

Juniper JunOS 15.1 F2

15.1

Juniper JunOS 15.1 F2-s1

15.1

Juniper Junos 15.1 F2-S2

15.1

Juniper Junos 15.1 F2-S3

15.1

Juniper Junos 15.1 F2-S4

15.1

Juniper Junos 15.1 F3

15.1

Juniper Junos 15.1 F4

15.1

Juniper Junos 15.1 F5

15.1

Juniper Junos 15.1 F5-S7

15.1

Juniper JUNOS 15.1 F6

15.1

Juniper JUNOS 15.1 F6-s1

15.1

Juniper Junos OS 15.1 F6-s12

15.1

Juniper JUNOS 15.1 F6-s2

15.1

Juniper JUNOS 15.1 F6-S3

15.1

Juniper Junos 15.1 F6-S4

15.1

Juniper Junos 15.1 F6-S7

15.1

Juniper JunOS 15.1 F7

15.1

Juniper Junos 15.1 R1

15.1

Juniper JunOS 15.1 R2

15.1

Juniper Junos 15.1 R3

15.1

Juniper JunOS 15.1 R4

15.1

Juniper Junos 15.1 R4-S7

15.1

Juniper Junos 15.1 R4-S8

15.1

Juniper Junos 15.1 R4-S9

15.1

Juniper JunOS 15.1 R5

15.1

Juniper Junos 15.1 R5-S1

15.1

Juniper Junos 15.1 R5-S5

15.1

Juniper JUNOS 15.1 R5-S6

15.1

Juniper JunOS 15.1 R6

15.1

Juniper Junos 15.1 R6-S1

15.1

Juniper JUNOS 15.1 R6-S2

15.1

Juniper Junos 15.1 R6-S6

15.1

Juniper Junos OS 15.1 R7

15.1

Juniper JUNOS 15.1 R7-S1

15.1

Juniper JUNOS 15.1 R7-S2

15.1

Juniper JUNOS 15.1 R7-S3

15.1

Juniper Junos OS 15.1 R7-s4

15.1

Juniper Junos OS 15.1 R7-s5

15.1

Juniper JUNOS 18.3

18.3

Juniper JUNOS 18.3 R1

18.3

Juniper JUNOS 18.3 R1-S1

18.3

Juniper JUNOS 18.3 R1-S2

18.3

Juniper JUNOS 18.3R1-S3

18.3

Juniper JUNOS 18.3 R1-S5

18.3

Juniper JUNOS 18.3 R1-S6

18.3

Juniper JUNOS 18.3 R2

18.3

Juniper JUNOS 18.3 R2-S1

18.3

Juniper JUNOS 18.3 R2-S2

18.3

Juniper JUNOS 18.3 R2-S3

18.3

Juniper JUNOS 18.3 R3

18.3

Juniper JUNOS 18.3 R3-S1

18.3

Juniper JUNOS 18.4

18.4

Juniper JunOS 18.4 R1

18.4

Juniper Junos OS 18.4 R1-S1

18.4

Juniper JUNOS 18.4R1-S2

18.4

Juniper JUNOS 18.4 R1-S5

18.4

Juniper JUNOS 18.4 R1-S6

18.4

Juniper JUNOS 18.4R2

18.4

Juniper JUNOS 18.4 R2-S1

18.4

Juniper JUNOS 18.4 R2-S2

18.4

Juniper JUNOS 18.4 R2-S3

18.4

Juniper JUNOS 18.4 R3

18.4

Juniper Junos OS 19.1

19.1

Juniper Junos OS 19.1 R1

19.1

Juniper Junos OS 19.1 R1-s1

19.1

Juniper JUNOS 19.1 R1-S2

19.1

Juniper JUNOS 19.1 R1-S3

19.1

Juniper JUNOS 19.1 R1-S4

19.1

Juniper Junos OS 19.1 R2

19.1

Juniper Junos OS 19.2

19.2

Juniper Junos OS 19.2 R1

19.2

Juniper JUNOS 19.2 R1-S1

19.2

Juniper JUNOS 19.2 R1-S2

19.2

Juniper JUNOS 19.2 R1-S3

19.2

Juniper JUNOS 19.3

19.3

Juniper JUNOS 19.3 R1

19.3

Juniper JUNOS 19.3 R1-S1

19.3

Juniper JUNOS 19.3 R2

19.3

Juniper JUNOS 19.3 R2-S1

19.3

Juniper JUNOS 19.3 R2-S2

19.3

Juniper JUNOS 19.4 R1

19.4

Juniper JUNOS 19.4 R1-S1

19.4

Juniper JUNOS 20.1 R1

20.1

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