Vulnerability Name:

CVE-2019-1905 (CCN-162742)

Assigned:2018-12-06
Published:2019-06-19
Updated:2019-10-09
Summary:A vulnerability in the GZIP decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device. The vulnerability is due to improper validation of GZIP-formatted files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted GZIP-compressed file. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email.
CVSS v3 Severity:5.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
5.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-1905

Source: BID
Type: Third Party Advisory, VDB Entry
108856

Source: XF
Type: UNKNOWN
cisco-cve20191905-sec-bypass(162742)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20190619-esa-bypass
Cisco Email Security Appliance GZIP Content Filter Bypass Vulnerability

Source: CISCO
Type: Vendor Advisory
20190619 Cisco Email Security Appliance GZIP Content Filter Bypass Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cisco:email_security_appliance:11.1.2:*:*:*:*:*:*:*
  • OR cpe:/a:cisco:email_security_appliance:12.0.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:cisco:email_security_appliance:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco email security appliance 11.1.2
    cisco email security appliance 12.0.0
    cisco email security appliance -