Vulnerability Name:

CVE-2019-1732 (CCN-161071)

Assigned:2018-12-06
Published:2019-05-15
Updated:2021-11-03
Summary:A vulnerability in the Remote Package Manager (RPM) subsystem of Cisco NX-OS Software could allow an authenticated, local attacker with administrator credentials to leverage a time-of-check, time-of-use (TOCTOU) race condition to corrupt local variables, which could lead to arbitrary command injection. The vulnerability is due to the lack of a proper locking mechanism on critical variables that need to stay static until used. An attacker could exploit this vulnerability by authenticating to an affected device and issuing a set of RPM-related CLI commands. A successful exploit could allow the attacker to perform arbitrary command injection. The attacker would need administrator credentials for the targeted device.
CVSS v3 Severity:6.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.9 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
6.0 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-667
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2019-1732

Source: BID
Type: Third Party Advisory, VDB Entry
108361

Source: XF
Type: UNKNOWN
cisco-cve20191732-cmd-exec(161071)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20190515-nxos-rpm-injec
Cisco NX-OS Software Remote Package Manager Command Injection Vulnerability

Source: CISCO
Type: Vendor Advisory
20190515 Cisco NX-OS Software Remote Package Manager Command Injection Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:nx-os:*:*:*:*:*:*:*:* (Version >= 7.0(3)i4 and < 7.0(3)i7(4))
  • AND
  • cpe:/h:cisco:nexus_3400:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3524-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9200:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9500:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3524-xl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3548-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3548-xl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9000:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3000:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3100:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3100-z:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3100v:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3200:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3500:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9300:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:cisco:nx-os:*:*:*:*:*:*:*:* (Version >= 7.0(3) and < 7.0(3)f3(5))
  • AND
  • cpe:/h:cisco:nexus_3600:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:nx-os:4.0(0)n1(1a):*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco nx-os *
    cisco nexus 3400 -
    cisco nexus 3524-x -
    cisco nexus 9200 -
    cisco nexus 9500 -
    cisco nexus 3524-xl -
    cisco nexus 3548-x -
    cisco nexus 3548-xl -
    cisco nexus 9000 -
    cisco nexus 3000 -
    cisco nexus 3100 -
    cisco nexus 3100-z -
    cisco nexus 3100v -
    cisco nexus 3200 -
    cisco nexus 3500 -
    cisco nexus 9300 -
    cisco nx-os *
    cisco nexus 3600 -
    cisco nx-os 4.0\(0\)n1\(1a\)