CVE-2020-7070
MEDIUM severity · CVSS 4.3 · Improper input validation
4.3CVSS MEDIUM
Summary
In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactNone
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)5%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://bugs.php.net/bug.php?id=79699Advisory
- http://cve.circl.lu/cve/CVE-2020-8184Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00045.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00067.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00008.htmlAdvisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EVDN7D3IB4EAI4D3ZOM2OJKQ5SD7K4E/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2J3ZZDHCSX65T5QWV4AHBN7MOJXBEKG/
- https://hackerone.com/reports/895727Advisory