Buffer overflow in GNU Glibc
CVE-2018-11236
stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpath function, could encounter an integer overflow on 32-bit architectures, leading to a stack-based buffer overflow and, potentially, arbitrary code execution.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.069 (94.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.071 · newest: 0.069 · change: -0.001
Affected products
- GNU Glibc
- NetApp Data Ontap Edge
- NetApp Element Software Management
- Oracle Communications Session Border Controller — versions 8.0.0, 8.1.0, 8.2.0
- Oracle Enterprise Communications Broker — versions 3.0.0, 3.1.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Workstation — versions 7.0
- Red Hat Virtualization Host — versions 4.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sourceware.org/git/gitweb.cgi
- www.securityfocus.com/bid/104255 (VDB Entry, Third Party Advisory, vdb-entry)
- sourceware.org/bugzilla/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2018:3092 (vendor-advisory, Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20190329-0001/ (Broken Link)
- security.netapp.com/advisory/ntap-20190401-0001/ (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (Patch, Third Party Advisory)
- access.redhat.com/errata/RHBA-2019:0327 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4416-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2018-11236?
- CVE-2018-11236 is a critical-severity vulnerability in GNU Glibc, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2018-05-18.
- How severe is CVE-2018-11236?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-11236 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.