- Issued:
- 2017-10-02
- Updated:
- 2017-10-02
RHSA-2017:2838 - Critical: dnsmasq security update
Synopsis
Critical: dnsmasq security update
Type/Severity
Security Advisory Critical
Topic
An update for dnsmasq is now available for Red Hat Enterprise Linux 6.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.
Security Fix(es):
- A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491)
Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting this issue.
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
Affected Products
| Product | Version | Arch |
|---|---|---|
| Red Hat Enterprise Linux for Scientific Computing | 6 | x86_64 |
| Red Hat Enterprise Linux for Power, big endian | 6 | ppc64 |
| Red Hat Enterprise Linux for IBM z Systems | 6 | s390x |
| Red Hat Enterprise Linux Workstation | 6 | x86_64 |
| Red Hat Enterprise Linux Workstation | 6 | i386 |
| Red Hat Enterprise Linux Server | 6 | x86_64 |
| Red Hat Enterprise Linux Server | 6 | i386 |
| Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support | 6 | x86_64 |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support | 6 | x86_64 |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support | 6 | i386 |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension | 6 | x86_64 |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension | 6 | i386 |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) | 6 | s390x |
| Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) | 6 | s390x |
| Red Hat Enterprise Linux Desktop | 6 | x86_64 |
| Red Hat Enterprise Linux Desktop | 6 | i386 |
Updated Packages
- dnsmasq-2.48-18.el6_9.x86_64.rpm
- dnsmasq-debuginfo-2.48-18.el6_9.i686.rpm
- dnsmasq-2.48-18.el6_9.i686.rpm
- dnsmasq-debuginfo-2.48-18.el6_9.ppc64.rpm
- dnsmasq-utils-2.48-18.el6_9.x86_64.rpm
- dnsmasq-2.48-18.el6_9.s390x.rpm
- dnsmasq-2.48-18.el6_9.ppc64.rpm
- dnsmasq-debuginfo-2.48-18.el6_9.x86_64.rpm
- dnsmasq-utils-2.48-18.el6_9.i686.rpm
- dnsmasq-utils-2.48-18.el6_9.ppc64.rpm
- dnsmasq-2.48-18.el6_9.src.rpm
- dnsmasq-utils-2.48-18.el6_9.s390x.rpm
- dnsmasq-debuginfo-2.48-18.el6_9.s390x.rpm
Fixes
CVEs
References
- https://access.redhat.com/security/updates/classification/#critical
- This content is not included.This content is not included.https://access.redhat.com/security/vulnerabilities/3199382
Additional information
- The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
- Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.