CVE-2015-7687: fedoraproject fedora Use After Free
CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2015-7687DEBIAN-CVE-2015-7687
Published 16-10-2017Last modified 06-08-2024
Vulnerability summary
CVE-2015-7687 is a critical (CVSS 9.8) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 4.04% chance of exploitation in the next 30 days, higher than 90.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
4.04%
0%100%
Low · -0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 16-10-2017PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
4.04%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
-0.05 pp
From 4.09% on 19-09-2026
19-09-202619-10-2026
EPSS score4.04%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (qualys.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- opensmtpd< 5.7.3p1-1
Fedoraproject1 product
- fedoraEOL22 | 23
Openbsd1 product
- opensmtpd≤ 5.7.1
Ubuntu1 product
- opensmtpdAll versions (No fix recorded)
4 vendors · 4 products
References
11 links- www.openwall.com/lists/oss-security/2015/10/03/1Mailing ListX Refsource MLISTThird Party AdvisoryVDB Entry
- lists.fedoraproject.org/pipermail/package-announce/2015-November/170448.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- www.qualys.com/2015/10/02/opensmtpd-audit-report.txtX Refsource MISCExploitTechnical DescriptionThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169600.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=1268793X Refsource CONFIRMIssue TrackingThird Party AdvisoryVDB Entry
