Cisco ASA/Firepower Threat Defense LDAP Basic Encoding Rule input validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.5 | $5k-$25k | 0.00 |
A vulnerability classified as problematic was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (version unknown). This vulnerability affects an unknown function of the component LDAP Handler. The manipulation as part of a Basic Encoding Rule 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 implementation of the Lightweight Directory Access Protocol (LDAP) feature in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerabilities are due to the improper parsing of LDAP packets sent to an affected device. An attacker could exploit these vulnerabilities by sending a crafted LDAP packet, using Basic Encoding Rules (BER), to be processed by an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
The bug was discovered 05/01/2019. The weakness was shared 05/03/2019 as cisco-sa-20190501-asa-ftds-lda as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2019-1697 since 12/06/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (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 316442 (Cisco Adaptive Security Appliance Software Lightweight Directory Access Protocol Denial of Service Vulnerability(cisco-sa-20190501-asa-ftds-ldapdos)).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.5VulDB 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.): 🔍
CVSSv2
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Timeline
12/06/2018 🔍05/01/2019 🔍
05/03/2019 🔍
05/03/2019 🔍
09/12/2023 🔍
Sources
Vendor: cisco.comAdvisory: cisco-sa-20190501-asa-ftds-lda
Status: Confirmed
CVE: CVE-2019-1697 (🔍)
SecurityFocus: 108182
Entry
Created: 05/03/2019 22:07Updated: 09/12/2023 08:58
Changes: 05/03/2019 22:07 (61), 06/06/2020 15:05 (1), 09/12/2023 08:57 (3), 09/12/2023 08:58 (12)
Complete: 🔍
Cache ID: 18:DA5:103
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