libevent: Out-of-bounds read in search_make_new()
Published Mar 15, 2017
7.5
HIGHCVSS 3.1
EPSS 5.19%
Description
The search_make_new function in evdns.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (out-of-bounds read) via an empty hostname.
Affected products
No data.
Configuration 1
- 8.0
Configuration 2
- ≤ 2.1.5
No data.
Red Hat Enterprise Linux 6
firefox-0:52.1.0-2.el6_9
Fixed · RHSA-2017:1104
Red Hat Enterprise Linux 6
thunderbird-0:52.1.0-1.el6_9
Fixed · RHSA-2017:1201
Red Hat Enterprise Linux 7
firefox-0:52.1.0-2.el7_3
Fixed · RHSA-2017:1106
Red Hat Enterprise Linux 7
thunderbird-0:52.1.0-1.el7_3
Fixed · RHSA-2017:1201
Red Hat Enterprise Linux 5
firefox
Will not fix
Red Hat Enterprise Linux 5
libevent
Will not fix
Red Hat Enterprise Linux 5
nfs-utils
Not affected
Red Hat Enterprise Linux 5
openmpi
Not affected
Red Hat Enterprise Linux 5
thunderbird
Will not fix
Red Hat Enterprise Linux 6
chromium-browser
Not affected
Red Hat Enterprise Linux 6
libevent
Will not fix
Red Hat Enterprise Linux 6
nfs-utils
Not affected
Red Hat Enterprise Linux 6
openmpi
Not affected
Red Hat Enterprise Linux 7
libevent
Will not fix
Red Hat Enterprise Linux 7
nfs-utils
Not affected
Red Hat Enterprise Linux 7
openmpi
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox-0:52.1.0-2.el6_9 | Fixed | RHSA-2017:1104 |
| Red Hat Enterprise Linux 6 | thunderbird-0:52.1.0-1.el6_9 | Fixed | RHSA-2017:1201 |
| Red Hat Enterprise Linux 7 | firefox-0:52.1.0-2.el7_3 | Fixed | RHSA-2017:1106 |
| Red Hat Enterprise Linux 7 | thunderbird-0:52.1.0-1.el7_3 | Fixed | RHSA-2017:1201 |
| Red Hat Enterprise Linux 5 | firefox | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | libevent | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | nfs-utils | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openmpi | Not affected | n/a |
| Red Hat Enterprise Linux 5 | thunderbird | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | chromium-browser | Not affected | n/a |
| Red Hat Enterprise Linux 6 | libevent | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | nfs-utils | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openmpi | Not affected | n/a |
| Red Hat Enterprise Linux 7 | libevent | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | nfs-utils | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openmpi | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.19% (0.05192) | 92.21th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.19% (0.05192) | 91.37th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.45% (0.01446) | 78.96th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.08% (0.04078) | 80.62th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.45% (0.01446) | 79.42th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.25% (0.00246) | 65.14th | v3 (v2023.03.01) |
| Feb 16, 2024 | 0.25% (0.00246) | 63.70th | v3 (v2023.03.01) |
| Jan 4, 2024 | 0.23% (0.00230) | 61.20th | v3 (v2023.03.01) |
| Jun 19, 2023 | 0.22% (0.00223) | 59.42th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.32% (0.00317) | 65.68th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (16)
- http://www.debian.org/security/2017/dsa-3789 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2017/01/31/17 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2017/02/02/7 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/96014 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038320 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1104 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1106 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1201 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-10197 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1418612 Issue Tracking
- https://github.com/libevent/libevent/blob/release-2.1.6-beta/ChangeLog x_refsource_CONFIRMRelease NotesThird Party Advisory
- https://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e x_refsource_CONFIRMPatchThird Party Advisory
- https://github.com/libevent/libevent/issues/332 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-10197
- https://security.gentoo.org/glsa/201705-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-10197
Change history (0)
No recorded changes yet.