CVE-2020-15049

Description

An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.

Category

9.9
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 15.65% Top 10%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory squid-cache.org Vendor Advisory squid-cache.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.squid-cache.org/Versions/v4/changesets/squid-4-ea12a34d338b962707d5078d6d1fc7c6eb119a22.patch patch vendor advisory
http://www.squid-cache.org/Versions/v5/changesets/squid-5-485c9a7bb1bba88754e07ad0094647ea57a6eb8d.patch patch vendor advisory
https://github.com/squid-cache/squid/security/advisories/GHSA-qf3v-rc95-96j5 third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7/ vendor advisory
https://www.debian.org/security/2020/dsa-4732 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html vendor advisory
https://usn.ubuntu.com/4551-1/ vendor advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html mailing list
https://security.netapp.com/advisory/ntap-20210312-0001/

Frequently Asked Questions

What is the severity of CVE-2020-15049?
CVE-2020-15049 has been scored as a critical severity vulnerability.
How to fix CVE-2020-15049?
To fix CVE-2020-15049, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-15049 being actively exploited in the wild?
It is possible that CVE-2020-15049 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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