Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody.
Published 2021-03-09 22:15:13
Updated 2023-02-03 18:56:37
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Execute codeInformation leak

Threat overview for CVE-2021-28116

Top countries where our scanners detected CVE-2021-28116
Top open port discovered on systems with this issue 8000
IPs affected by CVE-2021-28116 1,920,972
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-28116!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-28116

5.66%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 93 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-28116

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
NIST
3.7
LOW CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
2.2
1.4
MITRE
5.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.9
1.4
NIST

CWE ids for CVE-2021-28116

  • The product reads data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-28116

Products affected by CVE-2021-28116

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