Fedora 27 : glibc (2018-7714b514e2)
High Nessus Plugin ID 106279
SynopsisThe remote Fedora host is missing a security update.
DescriptionThis update addresses two security vulnerabilities :
- CVE-2017-16997: Check for empty tokens before dynamic string token expansion in the dynamic linker, so that pre-existing privileged programs with `$ORIGIN` rpaths/runpaths do not cause the dynamic linker to search the current directory, potentially leading to privilege escalation. (RHBZ#1526866).
- CVE-2018-1000001: `getcwd` would sometimes return a non-absolute path, confusing the `realpath` function, leading to privilege escalation in conjunction with user namespaces. (RHBZ#1533837)
In addition, this update changes the thread stack size accounting to provide additional stack space compared to previous glibc versions.
For some applications (`nptd` in particular), the `PTHREAD_STACK_MIN` stack size was too small on x86-64 machines with AVX-512 support (RHBZ#1527887).
Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected glibc package.