Out-of-bounds Read in Libarchive
CVE-2016-8688
The mtree bidder in libarchive 3.2.1 does not keep track of line sizes when extending the read-ahead, which allows remote attackers to cause a denial of service (crash) via a crafted file, which triggers an invalid read in the (1) detect_form or (2) bid_entry function in libarchive/archive_read_support_format_mtree.c.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (79.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Libarchive — versions 3.2.1
- openSUSE Leap — versions 42.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/10/16/11 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/11/msg00037.html (mailing-list)
- blogs.gentoo.org/ago/2016/09/11/libarchive-bsdtar-use-after-free-in-detect_form… (Patch, VDB Entry, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Issue Tracking)
- security.gentoo.org/glsa/201701-03 (vendor-advisory, Patch, VDB Entry, Third Party Advisory)
- github.com/libarchive/libarchive/commit/eec077f52bfa2d3f7103b4b74d52572ba8a15aca (Patch, Third Party Advisory, Issue Tracking)
- blogs.gentoo.org/ago/2016/09/11/libarchive-bsdtar-heap-based-buffer-overflow-in… (Patch, VDB Entry, Third Party Advisory)
- www.securityfocus.com/bid/93781 (VDB Entry, Third Party Advisory, vdb-entry)
- blogs.gentoo.org/ago/2016/09/11/libarchive-bsdtar-memory-corruptionunknown-cras… (Patch, VDB Entry, Third Party Advisory)
- blogs.gentoo.org/ago/2016/09/11/libarchive-bsdtar-heap-based-buffer-overflow-in… (Patch, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-8688?
- CVE-2016-8688 is a medium-severity vulnerability in Libarchive, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2017-02-15.
- How severe is CVE-2016-8688?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2016-8688 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.