Is CVE-2021-28677 in the CISA KEV catalog?

No. CVE-2021-28677 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28677?

CVE-2021-28677 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-28677?

CVE-2021-28677 has an EPSS score of 2.29% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28677?

Upgrade pillow on debian 11 to 8.1.2+dfsg-0.2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-28677

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.

How to fix

Remediation Available

pillowDebian

Fixed in:8.1.2+dfsg-0.2CVE-2021-28677

pillowUbuntu

Fixed in:2.3.0-1ubuntu3.4+esm5USN-8135-1

Fixed in:3.1.2-0ubuntu1.6+esm3USN-8135-1

Fixed in:5.1.0-1ubuntu0.6USN-4963-1

Fixed in:5.1.0-1ubuntu0.8+esm2USN-8135-1

Fixed in:7.0.0-4ubuntu0.4USN-4963-1

python-pilUbuntu

Fixed in:2.3.0-1ubuntu3.4+esm5USN-8135-1

Fixed in:3.1.2-0ubuntu1.6+esm3USN-8135-1

Fixed in:5.1.0-1ubuntu0.8+esm2USN-8135-1

Fixed in:5.1.0-1ubuntu0.6USN-4963-1

python3-pilUbuntu

Fixed in:2.3.0-1ubuntu3.4+esm5USN-8135-1

Fixed in:3.1.2-0ubuntu1.6+esm3USN-8135-1

Fixed in:5.1.0-1ubuntu0.6USN-4963-1

Fixed in:5.1.0-1ubuntu0.8+esm2USN-8135-1

Fixed in:7.0.0-4ubuntu0.4USN-4963-1

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

Exploit Intelligence

2.29%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

Other references1

lists.fedoraproject.org

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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.