CVE-2019-12677
CVSS V2 Medium 4
CVSS V3 Medium 6.5
Description
A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition that prevents the creation of new SSL/Transport Layer Security (TLS) connections to an affected device. The vulnerability is due to incorrect handling of Base64-encoded strings. An attacker could exploit this vulnerability by opening many SSL VPN sessions to an affected device. The attacker would need to have valid user credentials on the affected device to exploit this vulnerability. A successful exploit could allow the attacker to overwrite a special system memory location, which will eventually result in memory allocation errors for new SSL/TLS sessions to the device, preventing successful establishment of these sessions. A reload of the device is required to recover from this condition. Established SSL/TLS connections to the device and SSL/TLS connections through the device are not affected. Note: Although this vulnerability is in the SSL VPN feature, successful exploitation of this vulnerability would affect all new SSL/TLS sessions to the device, including management sessions.
Overview
- CVE ID
- CVE-2019-12677
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Modified
- Published Version
- 2019-10-02T19:15:12
- Last Modified Date
- 2022-05-25T17:34:45
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* | 1 | OR | 9.1.7.4 | |
| cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* | 1 | OR | 9.2 | 9.2.4.8 |
| cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* | 1 | OR | 9.4 | 9.4.2.11 |
| cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* | 1 | OR | 9.5 | 9.5.2.5 |
| cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* | 1 | OR | 9.6 | 9.6.2 |
| cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* | 1 | OR | 9.3 | 9.3.3.9 |
| cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5510:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5520:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5550:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ssl-vpn-dos | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-12677 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12677 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:03:15 | Added to TrackCVE | |||
| 2022-12-04 03:41:54 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-04 03:41:54 | 2019-10-02T19:15Z | 2019-10-02T19:15:12 | CVE Published Date | updated |
| 2022-12-04 03:41:54 | 2022-05-25T17:34:45 | CVE Modified Date | updated | |
| 2022-12-04 03:41:54 | Modified | Vulnerability Status | updated |