PublicDateAtUSN: 2019-11-26 17:15:00 UTC
Candidate: CVE-2019-18678
PublicDate: 2019-11-26 17:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18678
 http://www.squid-cache.org/Advisories/SQUID-2019_10.txt
 https://ubuntu.com/security/notices/USN-4213-1
Description:
 An issue was discovered in Squid 3.x and 4.x through 4.8. It allows
 attackers to smuggle HTTP requests through frontend software to a Squid
 instance that splits the HTTP Request pipeline differently. The resulting
 Response messages corrupt caches (between a client and Squid) with
 attacker-controlled content at arbitrary URLs. Effects are isolated to
 software between the attacker client and Squid. There are no effects on
 Squid itself, nor on any upstream servers. The issue is related to a
 request header containing whitespace between a header name and a colon.
Ubuntu-Description:
Notes:
Mitigation:
Bugs:
Priority: medium
Discovered-by: Régis Leroy
Assigned-to: mdeslaur
CVSS:
 nvd: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N [5.3 MEDIUM]

Patches_squid3:
upstream_squid3: needs-triage
precise/esm_squid3: ignored (end of ESM support, was needs-triage)
trusty_squid3: ignored (out of standard support)
trusty/esm_squid3: DNE
xenial_squid3: released (3.5.12-1ubuntu7.9)
esm-infra/xenial_squid3: released (3.5.12-1ubuntu7.9)
bionic_squid3: released (3.5.27-1ubuntu1.4)
disco_squid3: DNE
eoan_squid3: DNE
focal_squid3: DNE
groovy_squid3: DNE
hirsute_squid3: DNE
devel_squid3: DNE

Patches_squid:
 upstream: http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch
upstream_squid: released (4.9-1)
precise/esm_squid: DNE
trusty_squid: ignored (out of standard support)
trusty/esm_squid: DNE
xenial_squid: DNE
bionic_squid: DNE
disco_squid: released (4.4-1ubuntu2.3)
eoan_squid: released (4.8-1ubuntu2.1)
focal_squid: released (4.9-2ubuntu1)
groovy_squid: released (4.9-2ubuntu1)
hirsute_squid: released (4.9-2ubuntu1)
devel_squid: released (4.9-2ubuntu1)