Vulnerability in GNU Glibc
CVE-2009-5155
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (89.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- debbugs.gnu.org/cgi/bugreport.cgi (Mailing List, Vendor Advisory)
- security.netapp.com/advisory/ntap-20190315-0002/ (Patch, Third Party Advisory)
- debbugs.gnu.org/cgi/bugreport.cgi (Exploit, Mailing List, Vendor Advisory)
- sourceware.org/bugzilla/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- sourceware.org/git/gitweb.cgi
- git.savannah.gnu.org/cgit/gnulib.git/commit/ (Patch, Mailing List, Vendor Advisory)
- debbugs.gnu.org/cgi/bugreport.cgi (Exploit, Mailing List, Vendor Advisory)
- sourceware.org/bugzilla/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- support.f5.com/csp/article/K64119434
- support.f5.com/csp/article/K64119434
Frequently asked questions
- What is CVE-2009-5155?
- CVE-2009-5155 is a high-severity vulnerability in GNU Glibc, classified under CWE-19. CVSS score: 7.5/10. Published 2019-02-26.
- How severe is CVE-2009-5155?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2009-5155 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.