CVE-2015-0881
squid: CRLF injection flaw permitting HTTP response splitting attacks
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · March 6, 2015
Updated · January 14, 2026
Description
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.
Statement
This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Enterprise Linux 6 ships version 3.1.10 and Red Hat Enterprise Linux 7 ships version 3.3.8 of squide, both of which include the fix for this issue.
Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.3AV:N/AC:M/Au:N/C:N/I:P/A:N
CWE-113 · Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')