Is CVE-2017-9403 in the CISA KEV catalog?

No. CVE-2017-9403 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9403?

CVE-2017-9403 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2017-9403?

CVE-2017-9403 has an EPSS score of 1.25% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9403?

Upgrade tiff on debian 11 to 4.0.8-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2017-9403

MEDIUM

6.5

CVSS v3

NVD

Description

In LibTIFF 4.0.7, a memory leak vulnerability was found in the function TIFFReadDirEntryLong8Array in tif_dirread.c, which allows attackers to cause a denial of service via a crafted file.

CWE-772

How to fix

Remediation Available

tiffDebian

Fixed in:4.0.8-1CVE-2017-9403

libtiff-toolsUbuntu

Fixed in:4.0.3-7ubuntu0.8USN-3602-1

Fixed in:4.0.6-1ubuntu0.3USN-3602-1

libtiff5Ubuntu

Fixed in:4.0.3-7ubuntu0.8USN-3602-1

Fixed in:4.0.6-1ubuntu0.3USN-3602-1

tiffUbuntu

Fixed in:4.0.3-7ubuntu0.8USN-3602-1

Fixed in:4.0.6-1ubuntu0.3USN-3602-1

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.25%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Third-Party Advisory4

Related Vulnerabilities

Other CWE-772 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2003-0132	Medium	5.0	87%	-	Fix
CVE-2017-14495	High	7.5	84%	-	Fix
CVE-2021-22883	High	7.5	77%	-	Fix
CVE-2024-2398	High	8.6	36%	-	Fix
CVE-2020-9375	High	7.5	28%	-	-
CVE-1999-1127	High	7.5	18%	-	-

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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 2026-05-13.