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CVE-2018-1000877

28
FAUCET Score

CVE-2018-1000877 is a high-severity double free vulnerability (CWE-415) affecting libarchive versions 3.1.0 and later, impacting products like Canonical, Debian, FedoraProject, and Red Hat. This flaw, located in the RAR decoder, can lead to a denial-of-service (DoS) or system crash when a victim opens a specially crafted RAR archive. With a CVSS score of 8.8, it presents a high risk due to its network-based attack vector and low attack complexity, requiring user interaction. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.1.0, < 3.4.0CPE matchmatch criteria
cpe:2.3:a:libarchive:libarchive:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.58%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0457 is in the 90th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libarchive-0:3.1.2-12.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libarchive-0:3.3.2-7.el8
View patch

Vendor Advisories (1)

redhatCVE-2018-1000877Moderate

libarchive: Double free in RAR decoder resulting in a denial of service

Nov 20, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-04/msg00055.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-12/msg00012.html
lists.opensuse.org / opensuse-security-announce/2019-12/msg00015.html
access.redhat.com / errata/RHSA-2019:2298
Third Party Advisory
access.redhat.com / errata/RHSA-2019:3698
bugs.launchpad.net / ubuntu/+source/libarchive/+bug/1794909
Third Party Advisory
github.com / libarchive/libarchive/pull/1105
Third Party Advisory
github.com / libarchive/libarchive/pull/1105/commits/021efa522ad729ff0f5806c4ce53e4a6cc1daa31
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/12/msg00011.html
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/W645KCLWFDBDGFJHG57WOVXGE62QSIJI
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZVXA7PHINVT6DFF6PRLTDTVTXKDLVHNF
usn.ubuntu.com / 3859-1
Third Party Advisory
debian.org / security/2018/dsa-4360
Third Party Advisory
securityfocus.com / bid/106324
Third Party AdvisoryVDB Entry