CVE-2017-18269

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…

published May 18, 2018

CVSS
—
EPSS
5%
Percentile
91.6
In the wild
Unconfirmed
What it is

⚠️ A sneaky memory overlap bug in glibc could throw your data into disarray! This one might just corrupt the very essence of your applications. 🔥 Think of this vulnerability as a water leak in a pipeline where two separate sections overlap — if the pressure isn't monitored, the water (or data) can mix and cause a chaotic mess! If this memory copy operation goes wrong, it might lead to data corruption, allowing attackers to glean sensitive info or even crash your application. In the worst-case scenario, it could potentially pave the way for unauthorized code execution! Yikes!

Put simply

Think of this vulnerability as a water leak in a pipeline where two separate sections overlap — if the pressure isn't monitored, the water (or data) can mix and cause a chaotic mess! The flaw in glibc's SSE2 optimized memmove implementation fails to check if the source and destination memory areas overlap correctly, especially if they span the middle of the address space, leading to unexpected data corruption during copy operations.

What to do

If this memory copy operation goes wrong, it might lead to data corruption, allowing attackers to glean sensitive info or even crash your application. In the worst-case scenario, it could potentially pave the way for unauthorized code execution! Yikes! To mitigate this issue, ensure you're using glibc version 2.28 or later, where this vulnerability is addressed. It’s also wise to audit your applications for any direct dependencies on affected versions to prevent lurking issues. You've got this! Stay proactive, patch up, and you'll keep your systems secure! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.04629 · 91.6th percentile
Published
2018-05-18T16:00Z
EPSS history
Timeline
  • 18 MAY 16:00Z
    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…
    cvelistv5