Bug 1580924 (CVE-2017-18269) - CVE-2017-18269 glibc: memory corruption in memcpy-sse2-unaligned.S
Summary: CVE-2017-18269 glibc: memory corruption in memcpy-sse2-unaligned.S
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-18269
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1580934 1581365 1582354 1582355
Blocks: 1580945
TreeView+ depends on / blocked
 
Reported: 2018-05-21 21:17 UTC by Laura Pardo
Modified: 2021-02-17 00:17 UTC (History)
18 users (show)

Fixed In Version: glibc 2.28
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2020-05-20 21:18:30 UTC
Embargoed:


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Links
System ID Private Priority Status Summary Last Updated
Sourceware 22644 0 None None None 2018-05-22 05:30:54 UTC

Description Laura Pardo 2018-05-21 21:17:45 UTC
A flaw was found in the GNU C Library (aka glibc or libc6) 2.21 through 2.27. An SSE2-optimized memmove implementation for i386 in sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S 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.


References:
https://github.com/fingolfin/memmove-bug
https://sourceware.org/bugzilla/show_bug.cgi?id=22644

Patch:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cd66c0e584c6d692bc8347b5e72723d02b8a8ada

Comment 1 Laura Pardo 2018-05-21 21:18:28 UTC
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 1580934]

Comment 4 Riccardo Schirone 2018-05-22 15:15:39 UTC
Statement:

This issue did not affect the versions of glibc and compat-glibc as shipped with Red Hat Enterprise Linux 5, 6 and 7 as they did not include the vulnerable code.

Comment 6 Product Security DevOps Team 2020-05-20 21:18:30 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-18269


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