CVE-2016-6515: fedoraproject fedora Improper Input Validation
Vulnerability summary
CVE-2016-6515 is a high (CVSS 7.8) Improper Input Validation vulnerability in fedoraproject fedora. EPSS estimates a 58.57% chance of exploitation in the next 30 days, higher than 99.1% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (exploit-database, 07-12-2016)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 07-08-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
58.57%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
No change 0.00 pp
From 58.57% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundOpenSSH 7.2 - Denial of Service
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- openssh< 6.8_p1-r8 | < 7.2_p2-r2
Debian1 product
- openssh< 1:7.3p1-1 | < 1:6.0p1-4+deb7u6
Fedoraproject1 product
- fedoraEOL24
Openbsd1 product
- openssh≤ 7.2
Ubuntu1 product
- openssh< 1:6.6p1-2ubuntu2.8 | < 1:7.2p2-4ubuntu2.1
5 vendors · 5 products
References
20 links- www.securityfocus.com/bid/92212VDB Entry
- security.freebsd.org/advisories/FreeBSD-SA-17:06.openssh.ascVendor Advisory
- www.securitytracker.com/id/1036487VDB Entry
- lists.fedoraproject.org/archives/…Vendor Advisory
Show all 20 references
- access.redhat.com/errata/RHSA-2017:2029Vendor Advisory
