CVE-2017-15671 Denial of service in n/a
A memory leak in glibc's glob function when processing long usernames with GLOB_TILDE can lead to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-15671?
CVE-2017-15671 is a medium-severity denial of service vulnerability in Gnu Glibc, published on 20 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The glob function in glob.c in the GNU C Library (aka glibc or libc6) before 2.27, when invoked with GLOB_TILDE, could skip freeing allocated memory when processing the ~ operator with a long user name, potentially leading to a denial of service (memory leak).
Weakness: CWE-772
Which versions are affected by CVE-2017-15671?
It affects 1 product.
Linux distribution packages (6)
glibc SUSE:Linux Enterprise Point of Sale 11 SP3 | All versions | 2.11.3-17.110.24.2 |
glibc SUSE:Linux Enterprise Server 11 SP3-LTSS | All versions | 2.11.3-17.110.24.2 |
glibc SUSE:Linux Enterprise Server 11 SP3-TERADATA | All versions | 2.11.3-17.110.24.2 |
glibc SUSE:Linux Enterprise Server 11 SP4 | All versions | 2.11.3-17.110.24.2 |
glibc SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 2.11.3-17.110.24.2 |
glibc SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 2.11.3-17.110.24.2 |
Products include Gnu Glibc.
How do I fix CVE-2017-15671?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-15671 being exploited?
There is no known exploitation of CVE-2017-15671 in the wild and no public exploit code.
Other vulnerabilities in Gnu Glibc
Sources
Also known as DEBIAN-CVE-2017-15671, GHSA-3gv3-62jc-35qm, SUSE-SU-2018:4067-1, UBUNTU-CVE-2017-15671.