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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=cd66c0e584c6d692bc8347b5e72723d02b8a8ada ↗
- https://github.com/fingolfin/memmove-bug ↗
- https://sourceware.org/bugzilla/show_bug.cgi?id=22644 ↗
- https://security.netapp.com/advisory/ntap-20190329-0001/ ↗
- https://security.netapp.com/advisory/ntap-20190401-0001/ ↗
- https://usn.ubuntu.com/4416-1/ ↗