ID CVE-2019-1728
Summary A vulnerability in the Secure Configuration Validation functionality of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to run arbitrary commands at system boot time with the privileges of root. The vulnerability is due to a lack of proper validation of system files when the persistent configuration information is read from the file system. An attacker could exploit this vulnerability by authenticating to the device and overwriting the persistent configuration storage with malicious executable files. An exploit could allow the attacker to run arbitrary commands at system startup and those commands will run as the root user. The attacker must have valid administrative credentials for the device.
References
Vulnerable Configurations
  • Cisco NX-OS 8.1(0.2)S0
    cpe:2.3:o:cisco:nx-os:8.1%280.2%29s0
  • Cisco NX-OS 8.1(0.59)s0
    cpe:2.3:o:cisco:nx-os:8.1%280.59%29s0
  • Cisco NX-OS 8.1(0.112)s0
    cpe:2.3:o:cisco:nx-os:8.1%280.112%29s0
  • Cisco NX-OS 8.1(1)
    cpe:2.3:o:cisco:nx-os:8.1%281%29
  • Cisco NX-OS 8.1(1)S5
    cpe:2.3:o:cisco:nx-os:8.1%281%29s5
  • Cisco NX-OS 8.3(0)CV(0.342)
    cpe:2.3:o:cisco:nx-os:8.3%280%29cv%280.342%29
  • Cisco NX-OS 8.3(0)CV(0.345)
    cpe:2.3:o:cisco:nx-os:8.3%280%29cv%280.345%29
  • Cisco MDS 9000
    cpe:2.3:h:cisco:mds_9000
  • Cisco MDS 9100
    cpe:2.3:h:cisco:mds_9100
  • Cisco MDS 9200
    cpe:2.3:h:cisco:mds_9200
  • Cisco MDS 9500
    cpe:2.3:h:cisco:mds_9500
  • Cisco MDS 9700
    cpe:2.3:h:cisco:mds_9700
  • cpe:2.3:h:cisco:nexus_3000
    cpe:2.3:h:cisco:nexus_3000
  • cpe:2.3:h:cisco:nexus_3100
    cpe:2.3:h:cisco:nexus_3100
  • cpe:2.3:h:cisco:nexus_3100-z
    cpe:2.3:h:cisco:nexus_3100-z
  • cpe:2.3:h:cisco:nexus_3100v
    cpe:2.3:h:cisco:nexus_3100v
  • cpe:2.3:h:cisco:nexus_3200
    cpe:2.3:h:cisco:nexus_3200
  • cpe:2.3:h:cisco:nexus_3400
    cpe:2.3:h:cisco:nexus_3400
  • cpe:2.3:h:cisco:nexus_3500
    cpe:2.3:h:cisco:nexus_3500
  • cpe:2.3:h:cisco:nexus_3600
    cpe:2.3:h:cisco:nexus_3600
  • cpe:2.3:h:cisco:nexus_9000
    cpe:2.3:h:cisco:nexus_9000
  • cpe:2.3:h:cisco:nexus_9200
    cpe:2.3:h:cisco:nexus_9200
  • cpe:2.3:h:cisco:nexus_9300
    cpe:2.3:h:cisco:nexus_9300
  • Cisco Nexus 9500
    cpe:2.3:h:cisco:nexus_9500
  • cpe:2.3:h:cisco:nexus_3524-x
    cpe:2.3:h:cisco:nexus_3524-x
  • cpe:2.3:h:cisco:nexus_3524-xl
    cpe:2.3:h:cisco:nexus_3524-xl
  • cpe:2.3:h:cisco:nexus_3548-x
    cpe:2.3:h:cisco:nexus_3548-x
  • cpe:2.3:h:cisco:nexus_3548-xl
    cpe:2.3:h:cisco:nexus_3548-xl
  • Cisco NX-OS 7.3(0)N1(1)
    cpe:2.3:o:cisco:nx-os:7.3%280%29n1%281%29
  • Cisco NX-OS 7.3(0)ZN(0.9)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.9%29
  • Cisco NX-OS 7.3(0)ZN(0.81)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.81%29
  • Cisco NX-OS 7.3(0)ZN(0.83)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.83%29
  • Cisco NX-OS 7.3(2)N1(0.296)
    cpe:2.3:o:cisco:nx-os:7.3%282%29n1%280.296%29
  • Cisco NX-OS 7.3(2)n1(0.395)
    cpe:2.3:o:cisco:nx-os:7.3%282%29n1%280.395%29
  • cpe:2.3:h:cisco:nexus_5500
    cpe:2.3:h:cisco:nexus_5500
  • cpe:2.3:h:cisco:nexus_5600
    cpe:2.3:h:cisco:nexus_5600
  • cpe:2.3:h:cisco:nexus_6000
    cpe:2.3:h:cisco:nexus_6000
  • Cisco NX-OS 6.2(1)
    cpe:2.3:o:cisco:nx-os:6.2%281%29
  • Cisco NX-OS 6.2(1n)
    cpe:2.3:o:cisco:nx-os:6.2%281n%29
  • Cisco NX-OS 6.2(2)
    cpe:2.3:o:cisco:nx-os:6.2%282%29
  • Cisco NX-OS 6.2(2a)
    cpe:2.3:o:cisco:nx-os:6.2%282a%29
  • Cisco NX-OS 6.2(3)
    cpe:2.3:o:cisco:nx-os:6.2%283%29
  • Cisco NX-OS 6.2(3n)
    cpe:2.3:o:cisco:nx-os:6.2%283n%29
  • Cisco NX-OS 6.2(5)
    cpe:2.3:o:cisco:nx-os:6.2%285%29
  • Cisco NX-OS 6.2(5a)
    cpe:2.3:o:cisco:nx-os:6.2%285a%29
  • Cisco NX-OS 6.2(6)
    cpe:2.3:o:cisco:nx-os:6.2%286%29
  • Cisco NX-OS 6.2(6b)
    cpe:2.3:o:cisco:nx-os:6.2%286b%29
  • Cisco NX-OS 6.2(7)
    cpe:2.3:o:cisco:nx-os:6.2%287%29
  • Cisco NX-OS 6.2(8)
    cpe:2.3:o:cisco:nx-os:6.2%288%29
  • Cisco NX-OS 6.2(8a)
    cpe:2.3:o:cisco:nx-os:6.2%288a%29
  • Cisco NX-OS 6.2(8b)
    cpe:2.3:o:cisco:nx-os:6.2%288b%29
  • Cisco NX-OS 6.2(10)
    cpe:2.3:o:cisco:nx-os:6.2%2810%29
  • Cisco NX-OS 6.2(11b)
    cpe:2.3:o:cisco:nx-os:6.2%2811b%29
  • Cisco NX-OS 6.2(12)
    cpe:2.3:o:cisco:nx-os:6.2%2812%29
  • Cisco NX-OS 6.2(14)S1
    cpe:2.3:o:cisco:nx-os:6.2%2814%29s1
  • Cisco NX-OS 7.2(0)N1(0.1)
    cpe:2.3:o:cisco:nx-os:7.2%280%29n1%280.1%29
  • Cisco NX-OS 7.2(0)N1(1)
    cpe:2.3:o:cisco:nx-os:7.2%280%29n1%281%29
  • Cisco NX-OS 7.2(0)ZZ(99.1)
    cpe:2.3:o:cisco:nx-os:7.2%280%29zz%2899.1%29
  • Cisco NX-OS 7.2(0)ZZ(99.3)
    cpe:2.3:o:cisco:nx-os:7.2%280%29zz%2899.3%29
  • Cisco NX-OS 7.2(1)N1(1)
    cpe:2.3:o:cisco:nx-os:7.2%281%29n1%281%29
  • Cisco NX-OS 7.3(0)N1(1)
    cpe:2.3:o:cisco:nx-os:7.3%280%29n1%281%29
  • Cisco NX-OS 7.3(0)ZN(0.9)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.9%29
  • Cisco NX-OS 7.3(0)ZN(0.81)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.81%29
  • Cisco NX-OS 7.3(0)ZN(0.83)
    cpe:2.3:o:cisco:nx-os:7.3%280%29zn%280.83%29
  • Cisco NX-OS 7.3(2)N1(0.296)
    cpe:2.3:o:cisco:nx-os:7.3%282%29n1%280.296%29
  • Cisco NX-OS 7.3(2)n1(0.395)
    cpe:2.3:o:cisco:nx-os:7.3%282%29n1%280.395%29
  • Cisco NX-OS 8.0(1)S2
    cpe:2.3:o:cisco:nx-os:8.0%281%29s2
  • Cisco NX-OS 8.1(0.2)S0
    cpe:2.3:o:cisco:nx-os:8.1%280.2%29s0
  • Cisco NX-OS 8.1(0.59)s0
    cpe:2.3:o:cisco:nx-os:8.1%280.59%29s0
  • Cisco NX-OS 8.1(0.112)s0
    cpe:2.3:o:cisco:nx-os:8.1%280.112%29s0
  • Cisco NX-OS 8.1(1)
    cpe:2.3:o:cisco:nx-os:8.1%281%29
  • Cisco NX-OS 8.1(1)S5
    cpe:2.3:o:cisco:nx-os:8.1%281%29s5
  • Cisco NX-OS 8.3(0)CV(0.342)
    cpe:2.3:o:cisco:nx-os:8.3%280%29cv%280.342%29
  • Cisco NX-OS 8.3(0)CV(0.345)
    cpe:2.3:o:cisco:nx-os:8.3%280%29cv%280.345%29
  • Cisco Nexus 7000
    cpe:2.3:h:cisco:nexus_7000
  • Cisco Nexus 7700
    cpe:2.3:h:cisco:nexus_7700
  • Cisco NX-OS 4.0
    cpe:2.3:o:cisco:nx-os:4.0
  • Cisco NX-OS 4.0(0)N1(1a)
    cpe:2.3:o:cisco:nx-os:4.0%280%29n1%281a%29
  • Cisco NX-OS 4.0(0)N1(2)
    cpe:2.3:o:cisco:nx-os:4.0%280%29n1%282%29
  • Cisco NX-OS 4.0(0)N1(2a)
    cpe:2.3:o:cisco:nx-os:4.0%280%29n1%282a%29
  • Cisco NX-OS 4.0(1a)N1(1)
    cpe:2.3:o:cisco:nx-os:4.0%281a%29n1%281%29
  • Cisco NX-OS 4.0(1a)N1(1a)
    cpe:2.3:o:cisco:nx-os:4.0%281a%29n1%281a%29
  • Cisco NX-OS 4.0(1a)N2(1)
    cpe:2.3:o:cisco:nx-os:4.0%281a%29n2%281%29
  • Cisco NX-OS 4.0(1a)N2(1a)
    cpe:2.3:o:cisco:nx-os:4.0%281a%29n2%281a%29
  • Cisco NX-OS 4.0(4)SV1(1)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%281%29
  • Cisco NX-OS 4.0(4)SV1(2)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%282%29
  • Cisco NX-OS 4.0(4)SV1(3)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%283%29
  • Cisco NX-OS 4.0(4)SV1(3a)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%283a%29
  • Cisco NX-OS 4.0(4)SV1(3b)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%283b%29
  • Cisco NX-OS 4.0(4)SV1(3c)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%283c%29
  • Cisco NX-OS 4.0(4)SV1(3d)
    cpe:2.3:o:cisco:nx-os:4.0%284%29sv1%283d%29
  • cpe:2.3:h:cisco:ucs_6248up
    cpe:2.3:h:cisco:ucs_6248up
  • cpe:2.3:h:cisco:ucs_6296up
    cpe:2.3:h:cisco:ucs_6296up
  • cpe:2.3:h:cisco:ucs_6332
    cpe:2.3:h:cisco:ucs_6332
  • cpe:2.3:h:cisco:usc_6324
    cpe:2.3:h:cisco:usc_6324
  • cpe:2.3:h:cisco:usc_6332-16up
    cpe:2.3:h:cisco:usc_6332-16up
  • cpe:2.3:h:cisco:firepower_4110
    cpe:2.3:h:cisco:firepower_4110
  • cpe:2.3:h:cisco:firepower_4115
    cpe:2.3:h:cisco:firepower_4115
  • cpe:2.3:h:cisco:firepower_4120
    cpe:2.3:h:cisco:firepower_4120
  • cpe:2.3:h:cisco:firepower_4125
    cpe:2.3:h:cisco:firepower_4125
  • cpe:2.3:h:cisco:firepower_4140
    cpe:2.3:h:cisco:firepower_4140
  • cpe:2.3:h:cisco:firepower_4145
    cpe:2.3:h:cisco:firepower_4145
  • cpe:2.3:h:cisco:firepower_4150
    cpe:2.3:h:cisco:firepower_4150
  • cpe:2.3:h:cisco:firepower_9300
    cpe:2.3:h:cisco:firepower_9300
CVSS
Base: 7.2
Impact:
Exploitability:
CWE CWE-347
CAPEC
  • Padding Oracle Crypto Attack
    An attacker is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an attacker is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an attacker is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key. Any cryptosystem can be vulnerable to padding oracle attacks if the encrypted messages are not authenticated to ensure their validity prior to decryption, and then the information about padding error is leaked to the attacker. This attack technique may be used, for instance, to break CAPTCHA systems or decrypt/modify state information stored in client side objects (e.g., hidden fields or cookies). This attack technique is a side-channel attack on the cryptosystem that uses a data leak from an improperly implemented decryption routine to completely subvert the cryptosystem. The one bit of information that tells the attacker whether a padding error during decryption has occurred, in whatever form it comes, is sufficient for the attacker to break the cryptosystem. That bit of information can come in a form of an explicit error message about a padding error, a returned blank page, or even the server taking longer to respond (a timing attack). This attack can be launched cross domain where an attacker is able to use cross-domain information leaks to get the bits of information from the padding oracle from a target system / service with which the victim is communicating. To do so an attacker sends a request containing ciphertext to the target system. Due to the browser's same origin policy, the attacker is not able to see the response directly, but can use cross-domain information leak techniques to still get the information needed (i.e., information on whether or not a padding error has occurred). For instance, this can be done using "img" tag plus the onerror()/onload() events. The attacker's JavaScript can make web browsers to load an image on the target site, and know if the image is loaded or not. This is 1-bit information needed for the padding oracle attack to work: if the image is loaded, then it is valid padding, otherwise it is not.
refmap via4
bid 108391
cisco 20190515 Cisco FXOS and NX-OS Software Secure Configuration Bypass Vulnerability
Last major update 15-05-2019 - 13:29
Published 15-05-2019 - 13:29
Last modified 21-05-2019 - 09:29
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