Vulnerability in Sensiolabs Symfony
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. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (71.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Sensiolabs Symfony
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- symfony.com/blog/symfony-4-3-8-released (Release Notes)
- github.com/symfony/symfony/releases/tag/v4.3.8 (Release Notes)
- symfony.com/blog/cve-2019-18887-use-constant-time-comparison-in-urisigner (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2019-18887?
- CVE-2019-18887 is a high-severity vulnerability in Sensiolabs Symfony, classified under Observable Discrepancy. CVSS score: 8.1/10. Published 2019-11-21.
- How severe is CVE-2019-18887?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2019-18887 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.