Information Exposure Affecting dropbear package, versions <2018.76-4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN11-DROPBEAR-515579
- published22 Aug 2018
- disclosed21 Aug 2018
Introduced: 21 Aug 2018
CVE-2018-15599 (opens in a new tab)How to fix?
Upgrade Debian:11 dropbear to version 2018.76-4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dropbear package and not the dropbear package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2018-15599
- https://matt.ucc.asn.au/dropbear/CHANGES
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15599
- https://lists.debian.org/debian-lts-announce/2018/08/msg00026.html
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002108.html
- http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear/2018q3/002109.html
- https://old.reddit.com/r/blackhat/comments/97ywnm/openssh_username_enumeration/e4e05n2/
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-15599