RCE in Symfony Twig
CVE-2022-23614
Twig is an open source template language for PHP. When in a sandbox mode, the `arrow` parameter of the `sort` filter must be a closure to avoid attackers being able to run arbitrary PHP functions. In affected versions this constraint was not properly enforced and could lead to code injection of arbitrary PHP code. Patched versions now disallow calling non Closure in the `sort` filter as is the case for some other filters. Users are advised to upgrade.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.082 (94.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.082 · newest: 0.082 · change: 0.000
Affected products
- Symfony Twig
- Twigphp Twig — versions >= 3.0.0, < 3.3.8, >= 2.0.0, < 2.14.11
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/twigphp/Twig/security/advisories/GHSA-5mv2-rx3q-4w2v (Third Party Advisory)
- github.com/twigphp/Twig/commit/22b9dc3c03ee66d7e21d9ed2ca76052b134cb9e9 (Patch, Third Party Advisory)
- github.com/twigphp/Twig/commit/2eb33080558611201b55079d07ac88f207b466d5 (Patch, 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)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2022/dsa-5107 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-23614?
- CVE-2022-23614 is a high-severity vulnerability in Symfony Twig, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.8/10. Published 2022-02-04.
- How severe is CVE-2022-23614?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2022-23614 known to be exploited?
- 17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.