RHSA-2020:0889 - Security Advisory

Topic

An update for slirp4netns is now available for Red Hat Enterprise Linux 7 Extras.

Red Hat Product Security has rated this update as having a security impact of Important. 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 slirp4netns package contains user-mode networking for unprivileged network namespaces. It is required to enable networking for rootless containers.

Security Fix(es):

• QEMU: slirp: heap buffer overflow during packet reassembly (CVE-2019-14378)
• QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu() (CVE-2020-7039)
• CVE-2020-8608 slirp4netns: QEMU: Slirp: potential OOB access due to unsafe snprintf() usages
• CVE-2019-15890 QEMU: Slirp: use-after-free during packet reassembly

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le

Fixes

• BZ - 1734745 - CVE-2019-14378 QEMU: slirp: heap buffer overflow during packet reassembly
• BZ - 1749716 - CVE-2019-15890 QEMU: Slirp: use-after-free during packet reassembly
• BZ - 1791551 - CVE-2020-7039 QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()
• BZ - 1798453 - CVE-2020-8608 QEMU: Slirp: potential OOB access due to unsafe snprintf() usages

CVEs

• CVE-2019-14378
• CVE-2019-15890
• CVE-2020-7039
• CVE-2020-8608

References

• https://access.redhat.com/security/updates/classification/#important