CVE-2019-18408 — archive_read_format_rar_read_data in archive_read_support_format_rar

archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol.

01What is this vulnerability?

archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol.

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: 2019-10-24T13:37:39.000Z
• Last modified: 2024-08-05T01:54:14.375Z

09References

• bugs.chromium.org — https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14689
• github.com — https://github.com/libarchive/libarchive/commit/b8592ecba2f9e451e1f5cb7ab6dcee8b…
• github.com — https://github.com/libarchive/libarchive/compare/v3.3.3...v3.4.0
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/10/msg00034.html
• usn.ubuntu.com — https://usn.ubuntu.com/4169-1/
• www.debian.org — https://www.debian.org/security/2019/dsa-4557
• seclists.org — https://seclists.org/bugtraq/2019/Nov/2
• support.f5.com — https://support.f5.com/csp/article/K52144175?utm_source=f5support&amp%3Butm_medi…
• 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
• access.redhat.com — https://access.redhat.com/errata/RHSA-2020:0246
• access.redhat.com — https://access.redhat.com/errata/RHSA-2020:0271
• access.redhat.com — https://access.redhat.com/errata/RHSA-2020:0203
• security.gentoo.org — https://security.gentoo.org/glsa/202003-28
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…