The strListGetItem function in src/HttpHeaderTools.c in Squid 2.7 allows remote attackers to cause a denial of service via a crafted auth header with certain comma delimiters that trigger an infinite loop of calls to the strcspn function.
Published 2009-08-18 21:00:01
Updated 2017-09-19 01:29:20
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Products affected by CVE-2009-2855

Exploit prediction scoring system (EPSS) score for CVE-2009-2855

96.56%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2009-2855

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST

CWE ids for CVE-2009-2855

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)

Vendor statements for CVE-2009-2855

  • Red Hat 2010-03-31
    This issue did not affect the versions of the squid packages, as shipped with Red Hat Enterprise Linux 3 and 4. The issue was addressed in the squid packages as shipped with Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2010-0221.html

References for CVE-2009-2855

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