Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 461
Alerts This Week
Warning Icon 1 461

Red Hat: RHSA-2016:2600-02 Moderate: squid HTTP DoS Issue

red hat
Calendar Grey November 3, 2016
Scroller Redhat
CentOS recommends patching for Apache, classified as moderate, resolving vulnerabilities and improvements. Further information enclosed!
An update for squid is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the squid service will be restarted automatically.

Summary

Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.
The following packages have been upgraded to a newer upstream version: squid (3.5.20). (BZ#1273942, BZ#1349775)
Security Fix(es):
* Incorrect boundary checks were found in the way squid handled headers in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-2569, CVE-2016-2570)
* It was found that squid did not properly handle errors when failing to parse an HTTP response, possibly leading to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-2571, CVE-2016-2572)
* An incorrect boundary check was found in the way squid handled the Vary header in HTTP responses, which could lead to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response. (CVE-2016-3948)
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS moderate severity squid HTTP response

References

https://access.redhat.com/security/cve/CVE-2016-2569 https://access.redhat.com/security/cve/CVE-2016-2570 https://access.redhat.com/security/cve/CVE-2016-2571 https://access.redhat.com/security/cve/CVE-2016-2572 https://access.redhat.com/security/cve/CVE-2016-3948 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/Red_Hat_Enterprise_Linux/7/html/7.3_Release_Notes/index.html

Package List

Red Hat Enterprise Linux Server (v. 7):
Source: squid-3.5.20-2.el7.src.rpm
aarch64: squid-3.5.20-2.el7.aarch64.rpm squid-debuginfo-3.5.20-2.el7.aarch64.rpm squid-migration-script-3.5.20-2.el7.aarch64.rpm
ppc64: squid-3.5.20-2.el7.ppc64.rpm squid-debuginfo-3.5.20-2.el7.ppc64.rpm squid-migration-script-3.5.20-2.el7.ppc64.rpm
ppc64le: squid-3.5.20-2.el7.ppc64le.rpm squid-debuginfo-3.5.20-2.el7.ppc64le.rpm squid-migration-script-3.5.20-2.el7.ppc64le.rpm
s390x: squid-3.5.20-2.el7.s390x.rpm squid-debuginfo-3.5.20-2.el7.s390x.rpm squid-migration-script-3.5.20-2.el7.s390x.rpm
x86_64: squid-3.5.20-2.el7.x86_64.rpm squid-debuginfo-3.5.20-2.el7.x86_64.rpm squid-migration-script-3.5.20-2.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
aarch64: squid-debuginfo-3.5.20-2.el7.aarch64.rpm squid-sysvinit-3.5.20-2.el7.aarch64.rpm
ppc64: squid-debuginfo-3.5.20-2.el7.ppc64.rpm squid-sysvinit-3.5.20-2.el7.ppc64.rpm
ppc64le: squid-debuginfo-3.5.20-2.el7.ppc64le.rpm squid-sysvinit-3.5.20-2.el7.ppc64le.rpm
s390x: squid-debuginfo-3.5.20-2.el7.s390x.rpm squid-sysvinit-3.5.20-2.el7.s390x.rpm
x86_64: squid-debuginfo-3.5.20-2.el7.x86_64.rpm squid-sysvinit-3.5.20-2.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: squid-3.5.20-2.el7.src.rpm
x86_64:

Read the Full Advisory


Advisory ID: RHSA-2016:2600-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2600.html
Issue date: 2016-11-03

Topic

An update for squid is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix DoS moderate severity squid HTTP response

Relevant Releases Architectures

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1254016 - IPv4 fallback is not working when connecting to a dualstack host with non-functional IPv6

1254018 - should BuildRequire: g++

1299972 - squid file descriptor limit hardcoded to 16384 via compile option in spec file

1312257 - CVE-2016-2569 CVE-2016-2570 squid: some code paths fail to check bounds in string object

1312262 - CVE-2016-2571 CVE-2016-2572 squid: wrong error handling for malformed HTTP responses

1323594 - CVE-2016-3948 squid: denial of service issue in HTTP response processing

1330186 - digest doesn't properly work with squid 3.3 on CentOS 7

1336940 - Disable squid systemd unit start/stop timeouts

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.