Is CVE-2018-1000877 in the CISA KEV catalog?

No. CVE-2018-1000877 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-1000877?

CVE-2018-1000877 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2018-1000877?

CVE-2018-1000877 has an EPSS score of 4.58% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000877?

Upgrade libarchive on debian 11 to 3.3.3-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2018-1000877

HIGHEPSS 90th pctl

8.8

CVSS v3

NVD

Description

libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-415: Double Free vulnerability in RAR decoder - libarchive/archive_read_support_format_rar.c, parse_codes(), realloc(rar->lzss.window, new_size) with new_size = 0 that can result in Crash/DoS. This attack appear to be exploitable via the victim must open a specially crafted RAR archive.

CWE-415

How to fix

Remediation Available

libarchiveDebian

Fixed in:3.3.3-2CVE-2018-1000877

libarchiveUbuntu

Fixed in:3.1.2-7ubuntu2.7USN-3859-1

Fixed in:3.1.2-11ubuntu0.16.04.5USN-3859-1

Fixed in:3.2.2-3.1ubuntu0.2USN-3859-1

libarchive13Ubuntu

Fixed in:3.1.2-7ubuntu2.7USN-3859-1

Fixed in:3.1.2-11ubuntu0.16.04.5USN-3859-1

Fixed in:3.2.2-3.1ubuntu0.2USN-3859-1

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.58%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory8

Other references6

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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.