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CVE-2020-15811

MEDIUM

6.5

Description

An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Splitting attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the browser cache and any downstream caches with content from an arbitrary source. Squid uses a string search instead of parsing the Transfer-Encoding header to find chunked encoding. This allows an attacker to hide a second request inside Transfer-Encoding: it is interpreted by Squid as chunked and split out into a second request delivered upstream. Squid will then deliver two distinct responses to the client, corrupting any downstream caches.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published9/2/2020

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

canonical:ubuntu_linuxdebian:debian_linuxfedoraproject:fedoraopensuse:leapsquid-cache:squid

Weaknesses (CWE)

CWE-697

References

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html(cve@mitre.org)

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html(cve@mitre.org)

https://github.com/squid-cache/squid/security/advisories/GHSA-c7p8-xqhm-49wv(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/(cve@mitre.org)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/(cve@mitre.org)

https://security.netapp.com/advisory/ntap-20210219-0007/(cve@mitre.org)

https://security.netapp.com/advisory/ntap-20210226-0006/(cve@mitre.org)

https://security.netapp.com/advisory/ntap-20210226-0007/(cve@mitre.org)

https://usn.ubuntu.com/4477-1/(cve@mitre.org)

https://usn.ubuntu.com/4551-1/(cve@mitre.org)

https://www.debian.org/security/2020/dsa-4751(cve@mitre.org)

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html(af854a3a-2127-422b-91ae-364da2661108)

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/squid-cache/squid/security/advisories/GHSA-c7p8-xqhm-49wv(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20210219-0007/(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20210226-0006/(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20210226-0007/(af854a3a-2127-422b-91ae-364da2661108)

https://usn.ubuntu.com/4477-1/(af854a3a-2127-422b-91ae-364da2661108)

https://usn.ubuntu.com/4551-1/(af854a3a-2127-422b-91ae-364da2661108)

https://www.debian.org/security/2020/dsa-4751(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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