CVE-2020-3259
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow…
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 71.50%
- Chance of exploitation in the next 30 days. Higher than 99.42% of scored vulnerabilities.
- Known exploited
- Yes
- In CISA's catalog since Feb 15, 2024
- Weakness
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- Fix
- None yet
- No fixed version published
Description
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosure of confidential information. The vulnerability is due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. An attacker could exploit this vulnerability by sending a crafted GET request to the web services interface. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
How to fix
No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Weakness
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
How to prevent it
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Advisories
Other links
Timeline
- Published
- Added to CISA's Known Exploited Vulnerabilities catalog
- Remediation due for U.S. federal agencies
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-j7qq-vr8c-xvw3 MLflow CrewAI autologging records LLM provider API keys in logged trace spans | Medium | Same weakness, CWE-200 |
| GHSA-gqh3-7856-rjjg ApostropheCMS: :_id/locales REST route omits the public-API authorization gate its sibling read routes enforce (unauthenticated doc-existence + locale metadata disclosure) | Medium | Same weakness, CWE-200 |
| GHSA-rqgm-cfrp-4hx8 ApostropheCMS: Unauthenticated publicApiProjection bypass via search and sort query builders in the public REST API | Medium | Same weakness, CWE-200 |
| GHSA-f66c-mpj2-3r8h ApostropheCMS: POST /api/v1/@apostrophecms/doc/slugTaken discloses existence of private/admin-only content to any authenticated user | Medium | Same weakness, CWE-200 |
| GHSA-vfpm-58rq-9qcg Vite: First 4 bytes of files outside of `server.fs` setting is exposed by `?vite-wasm-instance` | Medium | Same weakness, CWE-200 |
| GHSA-23mf-xhv8-69c2 GitPython: arbitrary file read via attacker-controlled branch name in `Head.checkout()` (incomplete fix of CVE-2026-78679) | High | Same weakness, CWE-200 |
| GHSA-fx3j-rwgx-fr94 GitPython: separate_git_dir leaks env vars via crafted .gitmodules submodule name | High | Same weakness, CWE-200 |
| GHSA-vp88-798v-h67f rustls: ECH rejection can expose buffered application data to authenticated outer server before `ech_required` alert | Low | Same weakness, CWE-200 |
MergeHarbor checks every repository's dependencies against this database, ranks what matters by exploitability and reachability, routes it to the owning team and opens the fix pull request.
Check your repos with MergeHarbor