CVE-2017-18269
Publication date 18 May 2018
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| eglibc | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release | |
| 16.04 LTS xenial | Not in release | |
| 14.04 LTS trusty |
Not affected
|
|
| glibc | 20.04 LTS focal |
Not affected
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Fixed 2.23-0ubuntu11.2
|
|
| 14.04 LTS trusty | Not in release |
Notes
Patch details
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.8 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-4416-1
- GNU C Library vulnerabilities
- 6 July 2020