What’s Vulnerable › Vulnerabilities

CVE-2018-1000877

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-12-20 · updated 2026-06-17
• Weakness: CWE-415

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Debian Linux: 8.0, 9.0
• Fedoraproject Fedora: 28, 29, 30
• libarchive: from 3.1.0 before 3.4.0 — fixed in 3.4.0
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: libarchive 3.4.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html
• http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
• http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html
• http://www.securityfocus.com/bid/106324
• https://access.redhat.com/errata/RHSA-2019:2298
• https://access.redhat.com/errata/RHSA-2019:3698
• https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909
• https://github.com/libarchive/libarchive/pull/1105
• https://github.com/libarchive/libarchive/pull/1105/commits/021efa522ad729ff0f5806c4ce53e4a6cc1daa31
• https://lists.debian.org/debian-lts-announce/2018/12/msg00011.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W645KCLWFDBDGFJHG57WOVXGE62QSIJI/

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