What is CVE-2015-20109?

CVE-2015-20109 is a medium-severity vulnerability in Gnu Glibc, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2023-06-25.

How severe is CVE-2015-20109?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2015-20109 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Gnu Glibc

CVE-2015-20109

end_pattern (called from internal_fnmatch) in the GNU C Library (aka glibc or libc6) before 2.22 might allow context-dependent attackers to cause a denial of service (application crash), as demonstrated by use of the fnmatch library function with the **(!() pattern. NOTE: this is not the same as CVE-2015-8984; also, some Linux distributions have fixed CVE-2015-8984 but have not fixed this additional fnmatch issue.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Gnu Glibc
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org

Frequently asked questions

What is CVE-2015-20109?: CVE-2015-20109 is a medium-severity vulnerability in Gnu Glibc, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2023-06-25.
How severe is CVE-2015-20109?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2015-20109 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.