CVE-2015-7687
critical
CVSS v3
9.8
CVSS v4 NEW
—
VIR risk
9.8
Description
Use-after-free vulnerability in OpenSMTPD before 5.7.2 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via vectors involving req_ca_vrfy_smtp and req_ca_vrfy_mta.
Predictions
Exploit likelihood
97%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Fedora Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 23 | Affected | — |
| 22 | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.7.3p1-1 |
| sid | Fixed | 5.7.3p1-1 |
| forky | Fixed | 5.7.3p1-1 |
| bullseye | Fixed | 5.7.3p1-1 |
| bookworm | Fixed | 5.7.3p1-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| openbsd | opensmtpd | {"endIncluding":"5.7.1"} | |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.html
- http://www.openwall.com/lists/oss-security/2015/10/03/1
- http://www.securityfocus.com/bid/76975
- https://bugzilla.redhat.com/show_bug.cgi?id=1268793
- https://www.opensmtpd.org/announces/release-5.7.2.txt
- https://www.qualys.com/2015/10/02/opensmtpd-audit-report.txt
- https://security-tracker.debian.org/tracker/CVE-2015-7687
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.