Fluid Attacks Database

Description

Symfony Http-Kernel has non-constant time comparison in UriSigner When checking the signature of an URI (an ESI fragment URL for instance), the URISigner did not used a constant time string comparison function, resulting in a potential remote timing attack vulnerability.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
packagist	symfony/symfony	>=2.2.0 <2.8.52 \|\| >=3.0.0 <3.4.35 \|\| >=4.0.0 <4.2.12 \|\| >=4.3.0 <4.3.8	2.8.52, 3.4.35, 4.2.12, 4.3.8
packagist	symfony/http-kernel	>=2.2.0 <2.8.52 \|\| >=3.0.0 <3.4.35 \|\| >=4.0.0 <4.2.12 \|\| >=4.3.0 <4.3.8	2.8.52, 3.4.35, 4.2.12, 4.3.8
debian 11	symfony	>=0 <4.3.8+dfsg-1	4.3.8+dfsg-1
debian 12	symfony	>=0 <4.3.8+dfsg-1	4.3.8+dfsg-1
debian 13	symfony	>=0 <4.3.8+dfsg-1	4.3.8+dfsg-1
debian 14	symfony	>=0 <4.3.8+dfsg-1	4.3.8+dfsg-1

Aliases

1. CVE-2019-188872. NVD-2019-188873. OSV-2019-188874. OSV-DEBIAN-2019-188875. GCVE-2019-188876. SECURITY-TRACKER-CVE-2019-18887

References

1. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-kernel/CVE-2019-18887.yaml2. https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18887.yaml3. https://github.com/symfony/symfony/releases/tag/v4.3.84. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX5. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA6. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ7. https://lists.fedoraproject.org/archives/list/[email protected]/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX8. https://lists.fedoraproject.org/archives/list/[email protected]/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA9. https://lists.fedoraproject.org/archives/list/[email protected]/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ10. https://symfony.com/blog/cve-2019-18887-use-constant-time-comparison-in-urisigner11. https://symfony.com/blog/symfony-4-3-8-released12. https://symfony.com/cve-2019-18887

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