CVE-2019-1000020 — libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards (vers

libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards (version v2.8.0 onwards) contains a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in ISO9660 parser, archive_read_support_format_iso9660.c, read_CE()/parse_rockrid

01What is this vulnerability?

libarchive version commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards (version v2.8.0 onwards) contains a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in ISO9660 parser, archive_read_support_format_iso9660.c, read_CE()/parse_rockridge() that can result in DoS by infinite loop. This attack appears to be exploitable via the victim opening a specially crafted…

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-02-04T21:00:00.000Z
• Last modified: 2024-08-05T03:00:19.261Z

09References

• github.com — https://github.com/libarchive/libarchive/pull/1120
• usn.ubuntu.com — https://usn.ubuntu.com/3884-1/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/02/msg00013.html
• github.com — https://github.com/libarchive/libarchive/pull/1120/commits/8312eaa576014cd9b9650…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html
• access.redhat.com — https://access.redhat.com/errata/RHSA-2019:2298
• access.redhat.com — https://access.redhat.com/errata/RHSA-2019:3698
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html