THREATPORT/VULNERABILITY/CVE-2005-3774
MEDIUM SEVERITY

CVE-2005-3774

Pix vulnerability

CVSS
5.0
EPSS
18.2%
EPSS pct
97th
Exploited
No known
Cisco PIX 6.3 and 7.0 allows remote attackers to cause a denial of service (blocked new connections) via spoofed TCP packets that cause the PIX to create embryonic connections that that would not produce a valid connection with the end system, including (1) SYN packets with invalid checksums, which do not result in a RST; or, from an external interface, (2) one byte of "meaningless data," or (3) a TTL that is one less than needed to reach the internal destination.
Affected vendor
Cisco
Affected product
Pix
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published
2005-11-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 18.2% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2005-3774

  • Confirm whether Cisco Pix is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2005-3774.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-3774

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-3774 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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