CVE-2020-5255
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.7 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.9%
In Symfony before versions 4.4.7 and 5.0.7, when a Response does not contain a Content-Type header, affected versions of Symfony can fallback to the format defined in the Accept header of the request, leading to a possible mismatch between the response's content and Content-Type header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.
Affected configurations
CNA Affected
[
{
"product": "symfony",
"vendor": "symfony",
"versions": [
{
"status": "affected",
"version": ">= 4.4.0 and < 4.4.7"
},
{
"status": "affected",
"version": ">= 5.0.0 and < 5.0.7"
}
]
}
]References
github.com/symfony/symfony/commit/dca343442e6a954f96a2609e7b4e9c21ed6d74e6
github.com/symfony/symfony/security/advisories/GHSA-mcx4-f5f5-4859
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/
symfony.com/blog/cve-2020-5255-prevent-cache-poisoning-via-a-response-content-type-header
Related
4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
4.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.7 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.9%