CVE-2020-15811
Vulnerability from cvelistv5
Published
2020-09-02 16:35
Modified
2024-08-04 13:30
Severity ?
Summary
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.
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://github.com/squid-cache/squid/security/advisories/GHSA-c7p8-xqhm-49wvPatch
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2020/10/msg00005.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BE6FKUN7IGTIR2MEEMWYDT7N5EJJLZI2/Mailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMTFLVB7GLRF2CKGFPZ4G4R5DIIPHWI3/Mailing List, Third Party Advisory
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJJDI7JQFGQLVNCKMVY64LAFMKERAOK7/Mailing List, Third Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20210219-0007/Third Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20210226-0006/Third Party Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20210226-0007/Broken Link, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4477-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/4551-1/Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2020/dsa-4751Mailing List, Third Party Advisory
Impacted products
n/an/a
Show details on NVD website


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  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.