Integer overflow in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via the size argument to the __hcreate_r function, which triggers out-of-bounds heap-memory access.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-8778
• https://access.redhat.com/errata/RHSA-2017:1916
• https://seclists.org/bugtraq/2019/Sep/7
• https://security.gentoo.org/glsa/201602-02
• https://security.gentoo.org/glsa/201702-11
• https://sourceware.org/bugzilla/show_bug.cgi?id=18240
• https://www.sourceware.org/ml/libc-alpha/2016-02/msg00502.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184626.html
• http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
• http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html
• http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html
• http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html
• http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00042.html
• http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
• http://rhn.redhat.com/errata/RHSA-2017-0680.html
• http://seclists.org/fulldisclosure/2019/Sep/7
• http://www.debian.org/security/2016/dsa-3480
• http://www.debian.org/security/2016/dsa-3481
• http://www.openwall.com/lists/oss-security/2016/01/19/11
• http://www.openwall.com/lists/oss-security/2016/01/20/1
• http://www.securityfocus.com/bid/83275
• http://www.ubuntu.com/usn/USN-2985-1
• http://www.ubuntu.com/usn/USN-2985-2