CVE-2009-5155 Denial of service in n/a
Attackers can cause a denial of service or incorrect results in applications using glibc by triggering a misparse in regular expression matching.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2009-5155?
CVE-2009-5155 is a high-severity denial of service vulnerability in Gnu Glibc, published on 26 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.
Weakness: CWE-19
Which versions are affected by CVE-2009-5155?
It affects 4 products.
Products include Gnu Glibc, Netapp Cloud Backup, Netapp Ontap Select Deploy Administration Utility, Netapp Steelstore Cloud Integrated Storage.
How do I fix CVE-2009-5155?
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-2009-5155 being exploited?
There is no known exploitation of CVE-2009-5155 in the wild and no public exploit code.
Other vulnerabilities in Gnu Glibc
Sources
Also known as AZL-44574, AZL-44787, DEBIAN-CVE-2009-5155, GHSA-2p2p-xpf9-5p78, UBUNTU-CVE-2009-5155.