CVE-2017-5849: tiffttopnm in netpbm 10.47.63 does not properly use the libtiff TIFFRGBAImageGet function, which allows remote

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MEDIUM 5.5MITIGATEDOWNGRADE

CVE-2017-5849 is a medium-severity flaw (CVSS 5.5) affecting fedora, netpbm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

tiffttopnm in netpbm 10.47.63 does not properly use the libtiff TIFFRGBAImageGet function, which allows remote attackers to cause a denial of service (out-of-bounds read and write) via a crafted tiff image file, related to transposing width and height values.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-125, CWE-787
Published	2017-03-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fedoraproject · netpbm project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-03-15 19:59 UTCPublished CVE record published
2026-06-17 01:21 UTCUpdated Record last modified

fedoraproject fedora MITIGATE

Affected: 24 · 25

Fixed in: no fixed release known

Safe to downgrade to: a release before 24

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

netpbm project netpbm DOWNGRADE

Affected: 10.47.63

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.47.63

1. Check installed version

apt-cache policy netpbm || rpm -q netpbm || netpbm --version

2. No fixed release: DOWNGRADE to a release before 10.47.63 (Debian / Ubuntu)

apt-cache madison netpbm sudo apt install netpbm=<VERSION_BEFORE_10.47.63> sudo apt-mark hold netpbm

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list netpbm sudo dnf downgrade netpbm-<VERSION_BEFORE_10.47.63> sudo dnf versionlock add netpbm

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-5849?

fedora: mitigate or apply the listed mitigation; netpbm: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-5849 being exploited?

CVE-2017-5849 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-5849 affect?

CVE-2017-5849 affects fedora, netpbm. Severity is medium (CVSS 5.5). tiffttopnm in netpbm 10.47.63 does not properly use the libtiff TIFFRGBAImageGet function, which allows remote attackers to cause a denial of service (out-of-bounds read and write) via a crafted tiff image file, related to transposing width

How urgent is CVE-2017-5849?

Priority 44/100. Public exploit reference

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References

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