CVE-2009-5155
7.5
HIGH
CVSS 3.1
EPSS 1.3%
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.
How to fix CVE-2009-5155
To remediate CVE-2009-5155, upgrade the affected package to a fixed version below.
- Debian/glibc—upgrade to 2.28-1 or later
- —upgrade to 20140202+stable-3.2 or later
Is CVE-2009-5155 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.28-1
- from 0, < 20140202+stable-3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |