DaystoPatch

CiscoExploited incident

Cisco ASA and FTD Software Remote Access VPN Brute Force Denial of Service Vulnerability

CVE-2024-20481Medium, CVSS 5.8In CISA's Known Exploited Vulnerabilities catalog since 24 Oct 2024

  • Exploited before a fix
FixedFirst fix under an hour after the first public report. No evidence yet of when every version was fixed.

Response

Silence
0h
First public report to first vendor statement
Exposure
<1h
First public report to first fix
Follow-through
not dated
First public report to a fix for every supported version
  • Vendor silent
  • Vendor statement, no fix
  • Fixed for some versions
  • Fixed when disclosed
  • Date only, no time of day

Timeline and evidence

Open a moment to see its source and archived quote.

  1. First public report

    Cisco advisory cisco-sa-asaftd-bf-dos-vDZhLqrWClaimedQuote verified

    Initial public release.

    Vendor advisory was the first public report.

    Recorded time
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    To the minute
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    Claimed. The date the source gives.
    Quote check
    Found in the archived copy
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    sha256:43b4d9b537680f79…
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    Yes
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    5 more sources for this moment
    Cisco PSIRT advisory cisco-sa-asaftd-bf-dos-vDZhLqrWCuratedQuote not checked yet23 Oct 2024, 16:00 UTC

    The Cisco Product Security Incident Response Team (PSIRT) is aware of malicious use of the vulnerability that is described in this advisory.

    Disclosed with fixes in v1.0 (First Published 2024 October 23 16:00 GMT; the only version). The advisory links the bug to the password-spraying campaign Cisco Talos described earlier ('Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials'); that post did not identify this vulnerability, so it is not counted as the world signal.

    Recorded time
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    Curated. Found by a researcher, with a verbatim quote and link.
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    Not checked yet
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    CVE.org record CVE-2024-20481ClaimedQuote verified23 Oct 2024, 17:51 UTC

    A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote

    CVE record published.

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    Claimed. The date the source gives.
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    sha256:80e5161a0ea7168b…
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    Bluesky postClaimedQuote not checked yet23 Oct 2024, 18:16 UTC

    ID: CVE-2024-20481

    Earliest third-party post we hold.

    Source
    Bluesky post social
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    Not checked yet
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    CISA KEV (CVE-2024-20481)ClaimedQuote verified24 Oct 2024

    Cisco ASA and FTD Denial-of-Service Vulnerability

    Added to CISA's KEV catalog on 2024-10-24.

    Recorded time
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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:ef8fffede5c47200…
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    No, kept for the record
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    Mastodon postClaimedQuote not checked yet24 Oct 2024, 09:12 UTC

    CVE Alert: CVE-2024-20481 - https://www. redpacketsecurity.com/cve_aler t_cve-2024-20481/ # OSINT # ThreatIntel # CyberSecurity # cve_2024_20481

    Earliest third-party post we hold.

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    Mastodon post social
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    Not checked yet
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  2. Vendor statement

    at disclosure

    Cisco advisory cisco-sa-asaftd-bf-dos-vDZhLqrWClaimedQuote verified

    Initial public release.

    From the advisory's revision history.

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    sha256:43b4d9b537680f79…
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    1 more source for this moment
    Cisco PSIRT advisory cisco-sa-asaftd-bf-dos-vDZhLqrWCuratedQuote not checked yet23 Oct 2024, 16:00 UTC

    First Published: 2024 October 23 16:00 GMT

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    Curated. Found by a researcher, with a verbatim quote and link.
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  3. First workaround

    +<1h

    Cisco PSIRT advisory cisco-sa-asaftd-bf-dos-vDZhLqrWCuratedQuote verified

    However, there are mitigations that can be implemented for customers who are experiencing password spray attacks and have not upgraded to a fixed release.

    Mitigations are in Cisco's TechNote 'Recommendations Against Password Spray Attacks Aimed at Remote Access VPN Services in Secure Firewall'.

    Recorded time
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    To the minute
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
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    sha256:43b4d9b537680f79…
    Used in metrics
    Yes
    Dispute this timestamp

  4. First fix

    +<1h

    Cisco PSIRT advisory cisco-sa-asaftd-bf-dos-vDZhLqrWCuratedQuote verified

    Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

    Fixed releases are given only through the Cisco Software Checker.

    Recorded time
    Precision
    To the minute
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:43b4d9b537680f79…
    Used in metrics
    Yes
    Dispute this timestamp

  5. Fixed for all versions

    No evidence yet of fixed releases for every supported branch.

Send this to your boss

No brief for this incident yet. We write one for every open incident and every critical bug exploited before a fix.

Affected products

  • Cisco Adaptive Security Appliance (ASA) Software
  • Cisco Firepower Threat Defense (FTD) Software
How we built this timeline

Exploited at disclosure (Cisco aware of malicious use in the password-spray campaign); part of the October 2024 semiannual ASA/FMC/FTD bundled publication. Fixed for all versions omitted: no per-train fixed releases in the advisory (Software Checker only); status 'patched' because the advisory has had no revisions since v1.0 claiming fixed software.

Found during the resolution of a Cisco TAC support case. Severity follows the CVSS base score 5.8 (medium).

Related

No related incidents.

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