CVE-2016-10197
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 5.19% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 92.2% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-03-15 15:00Z9 YR AGO
- Last updated
- 2024-08-06 03:14Z2 YR AGO
- Reserved
- 2017-02-01
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 91627b86630d2244d231287346350ad1282e72bac49bab477f362a3133298b0c
05 Affected products
06 References
- www.securityfocus.com96014http://www.securityfocus.com/bid/96014
- access.redhat.comRHSA-2017:1106https://access.redhat.com/errata/RHSA-2017:1106
- www.debian.orgDSA-3789http://www.debian.org/security/2017/dsa-3789
- www.openwall.com[oss-security] 20170202 Re: Bugs fixed in libevent 2.1.6http://www.openwall.com/lists/oss-security/2017/02/02/7
- security.gentoo.orgGLSA-201705-01https://security.gentoo.org/glsa/201705-01
- github.comhttps://github.com/libevent/libevent/issues/332
- github.comhttps://github.com/libevent/libevent/commit/ec65c42052d95d2c23d1d837136d1cf1d9ecef9e
- www.openwall.com[oss-security] 20170131 Bugs fixed in libevent 2.1.6http://www.openwall.com/lists/oss-security/2017/01/31/17
- www.securitytracker.com1038320http://www.securitytracker.com/id/1038320
- github.comhttps://github.com/libevent/libevent/blob/release-2.1.6-beta/ChangeLog
- access.redhat.comRHSA-2017:1104https://access.redhat.com/errata/RHSA-2017:1104
- access.redhat.comRHSA-2017:1201https://access.redhat.com/errata/RHSA-2017:1201
07 Fixed in
Arch Linux
- libevent Fixed in 2.0.22-3
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- libevent Fixed in 2.0.21-stable-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libevent Fixed in 2.0.21-stable-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libevent Fixed in 2.0.21-stable-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- firefox Fixed in 53.0+build6-0ubuntu0.14.04.1
- libevent Fixed in 2.0.21-stable-1ubuntu1.14.04.2
- thunderbird Fixed in 1:52.1.1+build1-0ubuntu0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- firefox Fixed in 53.0+build6-0ubuntu0.16.04.1
- libevent Fixed in 2.0.21-stable-2ubuntu0.16.04.1
- thunderbird Fixed in 1:52.1.1+build1-0ubuntu0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.