High severity · published Nov 21, 2019
CVE-2019-18887
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7
8.1
CVSS
1.3%
EPSS
No
On KEV
Description
An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
30; 31 · source: NVD
SY
Symfony · Sensiolabs
2.8.0 through 2.8.50; 3.4.0 through 3.4.34; 4.2.0 through 4.2.11; 4.3.0 through 4.3.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18887
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18887
Release Notes
https://github.com/symfony/symfony/releases/tag/v4.3.8
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ/
Vendor Advisory
https://symfony.com/blog/cve-2019-18887-use-constant-time-comparison-in-urisigner
Release Notes
https://symfony.com/blog/symfony-4-3-8-released
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