Improper input validation in Novell Leap
CVE-2017-13704
In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero's (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.654 (99.3th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.654 · newest: 0.654 · change: 0.000
Affected products
- Novell Leap — versions 42.2, 42.3
- Thekelleys Dnsmasq
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.04
- Debian Linux — versions 7.0, 7.1, 9.0
- Fedoraproject Fedora — versions 27
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
References
- www.securitytracker.com/id/1039474 (VDB Entry, Third Party Advisory, vdb-entry)
- www.synology.com/support/security/Synology_SA_17_59_Dnsmasq
- access.redhat.com/security/vulnerabilities/3199382 (Third Party Advisory, Issue Tracking)
- www.securityfocus.com/bid/101085 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/101977 (vdb-entry)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg11665.html (mailing-list)
- thekelleys.org.uk/gitweb/
- thekelleys.org.uk/dnsmasq/CHANGELOG (Release Notes, Vendor Advisory)
- security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2017-13704?
- CVE-2017-13704 is a high-severity vulnerability in Novell Leap, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-10-03.
- How severe is CVE-2017-13704?
- High severity. CVSS v3 base score is 7.5 out of 10.