Vulnerability in Sensiolabs Httpclient
CVE-2020-15094
In Symfony before versions 4.4.13 and 5.1.5, the CachingHttpClient class from the HttpClient Symfony component relies on the HttpCache class to handle requests. HttpCache uses internal headers like X-Body-Eval and X-Body-File to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient and if an attacker can control the response for a request being made by the CachingHttpClient, remote code execution is possible. This has been fixed in versions 4.4.13 and 5.1.5.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (87.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Sensiolabs Httpclient
- Sensiolabs Symfony
- Symfony — versions >= 4.4.0, < 4.4.13, >= 5.0.0, < 5.1.5
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r (Third Party Advisory)
- github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78 (Patch, Third Party Advisory)
- packagist.org/packages/symfony/symfony (Product, Third Party Advisory)
- packagist.org/packages/symfony/http-kernel (Product, Third Party 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-2020-15094?
- CVE-2020-15094 is a high-severity vulnerability in Sensiolabs Httpclient, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 8.0/10. Published 2020-09-02.
- How severe is CVE-2020-15094?
- High severity. CVSS v3 base score is 8.0 out of 10.
- Is CVE-2020-15094 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.