CVE-2015-0881

Squid vulnerability

CVSS

4.3

EPSS

4.5%

EPSS pct

91th

Exploited

No known

CRLF injection vulnerability in Squid before 3.1.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted header in a response.

Affected vendor

Squid Cache

Affected product

Squid

CVSS vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Published

2015-02-20

Risk analysis

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

Its EPSS score of 4.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2015-0881

Confirm whether Squid Cache Squid is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-0881.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-0881

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-0881 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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