CVE-2018-20657 Denial of service in n/a
A memory leak in GNU libiberty allows attackers to cause denial of service via crafted strings, impacting systems using Binutils.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-20657?
CVE-2018-20657 is a high-severity denial of service vulnerability in Gnu Binutils, published on 2 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, has a memory leak via a crafted string, leading to a denial of service (memory consumption), as demonstrated by cxxfilt, a related issue to CVE-2018-12698.
Weakness: CWE-772
Which versions are affected by CVE-2018-20657?
It affects 2 products.
Linux distribution packages (6)
gdb Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
gdb-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
gdb-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
gdb-doc Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
gdb-gdbserver Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
gdb-headless Red Hat:enterprise_linux:8::appstream | All versions | 0:8.2-6.el8 |
Products include F5 Traffix Signaling Delivery Controller, Gnu Binutils.
How do I fix CVE-2018-20657?
Apply the vendor's patch.
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-2018-20657 being exploited?
There is no known exploitation of CVE-2018-20657 in the wild and no public exploit code.
Other vulnerabilities in Gnu Binutils
Sources
Also known as GHSA-qhfg-hc2h-mmfc, RHSA-2019:3352, UBUNTU-CVE-2018-20657.