Is CVE-2009-5155 in the CISA KEV catalog?

No. CVE-2009-5155 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-5155?

CVE-2009-5155 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2009-5155?

CVE-2009-5155 has an EPSS score of 3.91% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-5155?

Upgrade glibc on debian 11 to 2.28-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2009-5155

HIGHEPSS 89th pctl

7.5

CVSS v3

NVD

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.

CWE-19

How to fix

Remediation Available

glibcDebian

Fixed in:2.28-1CVE-2009-5155

glibcUbuntu

Fixed in:2.23-0ubuntu11.3USN-4954-1

libc6Ubuntu

Fixed in:2.23-0ubuntu11.3USN-4954-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.91%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Patch2

Exploit4

Vendor Advisory1

debbugs.gnu.org

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.