Resource exhaustion in OpenBSD OpenSSH
CVE-2010-5107
The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.165 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.165 · newest: 0.165 · change: 0.000
Affected products
- OpenBSD OpenSSH — versions 1.2, 1.2.1, 1.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/servconf.c
- rhn.redhat.com/errata/RHSA-2013-1591.html (vendor-advisory)
- marc.info/ (vendor-advisory)
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshd_config
- bugzilla.redhat.com/show_bug.cgi
- www.securityfocus.com/bid/58162 (vdb-entry)
- www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
- www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshd_config.5
- www.openwall.com/lists/oss-security/2013/02/07/3 (mailing-list)
Frequently asked questions
- What is CVE-2010-5107?
- CVE-2010-5107 is a high-severity vulnerability in OpenBSD OpenSSH, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2013-03-07.
- How severe is CVE-2010-5107?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2010-5107 known to be exploited?
- 30 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.