Information disclosure in Dropbear SSH Project
CVE-2018-15599
The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.027 (85.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- Dropbear SSH Project
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- matt.ucc.asn.au/dropbear/CHANGES
- lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html (Mailing List, Third Party Advisory)
- lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/08/msg00026.html (mailing-list, Mailing List, Third Party Advisory)
- old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2018-15599?
- CVE-2018-15599 is a medium-severity vulnerability in Dropbear SSH Project, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-08-21.
- How severe is CVE-2018-15599?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2018-15599 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.