VDB-134338 · CVE-2019-1687 · BID 108176

Cisco ASA/Firepower Threat Defense CP Proxy Function Packet Sequence input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$5k-$25k0.00

A vulnerability has been found in Cisco ASA and Firepower Threat Defense (Firewall Software) (affected version unknown) and classified as problematic. This vulnerability affects an unknown functionality of the component CP Proxy Function. The manipulation as part of a Packet Sequence leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

A vulnerability in the TCP proxy functionality for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error in TCP-based packet inspection, which could cause the TCP packet to have an invalid Layer 2 (L2)-formatted header. An attacker could exploit this vulnerability by sending a crafted TCP packet sequence to the targeted device. A successful exploit could allow the attacker to cause a DoS condition.

The bug was discovered 05/01/2019. The weakness was presented 05/03/2019 as cisco-sa-20190501-asa-ftdtcp-d as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability was named CVE-2019-1687 since 12/06/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/12/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316443 (Cisco Adaptive Security Appliance Software TCP Proxy Denial of Service Vulnerability(cisco-sa-20190501-asa-ftdtcp-dos)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See 134342, 134341 and 134340 for similar entries.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 6.8
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2018 🔍
05/01/2019 +146 days 🔍
05/03/2019 +2 days 🔍
05/03/2019 +0 days 🔍
09/12/2023 +1593 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190501-asa-ftdtcp-d
Status: Confirmed

CVE: CVE-2019-1687 (🔍)
SecurityFocus: 108176

See also: 🔍

Entryinfo

Created: 05/03/2019 22:03
Updated: 09/12/2023 08:24
Changes: 05/03/2019 22:03 (61), 06/06/2020 14:27 (1), 09/12/2023 08:23 (3), 09/12/2023 08:24 (12)
Complete: 🔍

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