CVE-2017-18269 Information

Description

An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S in the GNU C Library (aka glibc or libc6) 2.21 through 2.27 does not correctly perform the overlapping memory check if the source memory range spans the middle of the address space resulting in corrupt data being produced by the copy operation. This may disclose information to context-dependent attackers or result in a denial of service or possibly code execution.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/fingolfin/memmove-bug https://security.netapp.com/advisory/ntap-20190329-0001/ https://security.netapp.com/advisory/ntap-20190401-0001/ https://sourceware.org/bugzilla/show_bug.cgi?id=22644 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cd66c0e584c6d692bc8347b5e72723d02b8a8ada https://usn.ubuntu.com/4416-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8