Bug 1871702 (CVE-2020-15811) - CVE-2020-15811 squid: HTTP Request Splitting could result in cache poisoning
Summary: CVE-2020-15811 squid: HTTP Request Splitting could result in cache poisoning
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-15811
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1871704 Red Hat1872342 Red Hat1872343 Red Hat1872344 Red Hat1872345 Red Hat1872346
Blocks: Embargoed1871707
TreeView+ depends on / blocked
 
Reported: 2020-08-24 04:59 UTC by Michael Kaplan
Modified: 2021-02-16 19:26 UTC (History)
5 users (show)

Fixed In Version: squid 4.13, squid 5.0.4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in squid. Due to incorrect data validation, an HTTP Request Splitting attack against HTTP and HTTPS traffic is possible leading to cache poisoning. The highest threat from this vulnerability is to data confidentiality and integrity.
Clone Of:
Environment:
Last Closed: 2020-09-03 19:17:46 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:3623 0 None None None 2020-09-03 13:01:01 UTC
Red Hat Product Errata RHSA-2020:4082 0 None None None 2020-09-30 07:01:12 UTC

Description Michael Kaplan 2020-08-24 04:59:06 UTC 
Due to incorrect data validation Squid is vulnerable to HTTP Request Splitting
attacks against HTTP and HTTPS traffic. This leads to cache poisoning.

Upstream Advisory:

https://github.com/squid-cache/squid/security/advisories/GHSA-c7p8-xqhm-49wv

Affected Versions: 2.7-3.5.28, 4.0-4.12, 5.0.1-5.0.3 
Fixed Versions: 4.13, 5.0.4
Comment 1 Michael Kaplan 2020-08-24 05:01:17 UTC 
Created squid tracking bugs for this issue:

Affects: fedora-all [bug 1871704]
Comment 3 Cedric Buissart 2020-08-27 07:31:24 UTC 
Upstream commit:
https://github.com/squid-cache/squid/commit/fd68382860633aca92065e6c343cfd1b12b126e7
Comment 4 Cedric Buissart 2020-08-27 07:33:25 UTC 
Mitigation:

Disable the relaxed HTTP parser in `squid.conf`:

```
relaxed_header_parser off
```
Comment 6 errata-xmlrpc 2020-09-03 13:00:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.1 Extended Update Support
  Red Hat Enterprise Linux 8

Via RHSA-2020:3623 https://access.redhat.com/errata/RHSA-2020:3623
Comment 7 Product Security DevOps Team 2020-09-03 19:17:46 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-15811
Comment 9 errata-xmlrpc 2020-09-30 07:01:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4082 https://access.redhat.com/errata/RHSA-2020:4082
Note You need to log in before you can comment on or make changes to this bug.