Double Free in Nmap
CVE-2017-18594
nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \n character to ssh-brute.nse or ssh-auth-methods.nse.
Vulnerability class: Double Free
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: 0.032 (87.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- Nmap — versions 7.70
Weakness classification (CWE)
References
- seclists.org/nmap-dev/2018/q2/45 (Mailing List, Third Party Advisory)
- github.com/nmap/nmap/issues/1227 (Exploit, Third Party Advisory)
- github.com/nmap/nmap/commit/350bbe0597d37ad67abe5fef8fba984707b4e9ad (Patch, Third Party Advisory)
- github.com/nmap/nmap/issues/1077 (Patch, Third Party Advisory)
- github.com/AMatchandaHaystack/Research/blob/master/Nmap&libsshDF (Third Party Advisory)
- seclists.org/nmap-announce/2019/0 (Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00073.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00075.html (vendor-advisory)
Frequently asked questions
- What is CVE-2017-18594?
- CVE-2017-18594 is a high-severity vulnerability in Nmap, classified under Double Free. CVSS score: 7.5/10. Published 2019-08-29.
- How severe is CVE-2017-18594?
- High severity. CVSS v3 base score is 7.5 out of 10.