CVE-2020-15049
An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.71% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-444
- Affected
- squid-cache/squid · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 5.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-ea12a34d338b962707d5078d6d1fc7c6eb119a22.patchPatch, Vendor Advisory
- http://www.squid-cache.org/Versions/v5/changesets/squid-5-485c9a7bb1bba88754e07ad0094647ea57a6eb8d.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-qf3v-rc95-96j5Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7/
- https://security.netapp.com/advisory/ntap-20210312-0001/
- https://usn.ubuntu.com/4551-1/
- https://www.debian.org/security/2020/dsa-4732
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-ea12a34d338b962707d5078d6d1fc7c6eb119a22.patchPatch, Vendor Advisory
- http://www.squid-cache.org/Versions/v5/changesets/squid-5-485c9a7bb1bba88754e07ad0094647ea57a6eb8d.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/security/advisories/GHSA-qf3v-rc95-96j5Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7/
- https://security.netapp.com/advisory/ntap-20210312-0001/
- https://usn.ubuntu.com/4551-1/
- https://www.debian.org/security/2020/dsa-4732
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.