CVE-2017-3599
HighPublic exploitmysql: integer underflow in get_56_lenc_string() leading to DoS (CPU Apr 2017)
Published Apr 19, 2017 · Updated Jul 8, 2026 · Also known as UBUNTU-CVE-2017-3599
Key Facts
Patch immediately- CVE-2017-3599 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Mysql (Oracle), mysql-5.5 (ubuntu), mysql-5.7 (ubuntu) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 90% probability of exploitation in the next 30 days.
- Fixed versions are available, including libmysql56client_r18 5.6.36-24.3.3, libmysql56client_r18-32bit 5.6.36-24.3.3, libmysql56client18 5.6.36-24.3.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
90%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2017-3599 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Pluggable Auth). Supported versions that are affected are 5.6.35 and earlier and 5.7.17 and earlier. Easily "exploitable" vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). NOTE: the previous information is from the April 2017 CPU. Oracle has not commented on third-party claims that this issue is an integer overflow in sql/auth/sql_authentication.cc which allows remote attackers to cause a denial of service via a crafted authentication packet.
Affected Products
39 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MysqlOracle | See advisory | 5.6.35 |
| mysql-5.5ubuntu | See advisory | 5.5.55-0ubuntu0.14.04.1 |
| mysql-5.7ubuntu | See advisory | 5.7.18-0ubuntu0.16.04.1 |
| percona-server-5.6ubuntu | See advisory | n/a |
| percona-xtradb-cluster-5.6ubuntu | See advisory | n/a |
Patched Releases
libmysql56client_r18
5.6.36-24.3.3
libmysql56client_r18-32bit
5.6.36-24.3.3
libmysql56client18
5.6.36-24.3.3
libmysql56client18-32bit
5.6.36-24.3.3
mysql-5.5
5.5.55-0ubuntu0.14.04.1
mysql-5.7
5.7.18-0ubuntu0.16.04.1
mysql-community-server
5.6.36-24.3.3
mysql-community-server-bench
5.6.36-24.3.3
mysql-community-server-client
5.6.36-24.3.3
mysql-community-server-errormessages
5.6.36-24.3.3
mysql-community-server-test
5.6.36-24.3.3
mysql-community-server-tools
5.6.36-24.3.3
mysql56
5.6.36-1.25.amzn1
mysql56-bench
5.6.36-1.25.amzn1
mysql56-common
5.6.36-1.25.amzn1
mysql56-devel
5.6.36-1.25.amzn1
mysql56-embedded
5.6.36-1.25.amzn1
mysql56-embedded-devel
5.6.36-1.25.amzn1
mysql56-errmsg
5.6.36-1.25.amzn1
mysql56-libs
5.6.36-1.25.amzn1
mysql56-server
5.6.36-1.25.amzn1
mysql56-test
5.6.36-1.25.amzn1
Mysql
5.6.35
rh-mysql56-mysql
0:5.6.37-5.el6, 0:5.6.37-5.el7
rh-mysql57-mysql
0:5.7.19-6.el6, 0:5.7.19-6.el7
Timeline
Publicly disclosed
Apr 19, 2017
Last updated
Jul 8, 2026
Weakness Type
- CWE-190 Integer Overflow or Wraparound
References
- advisoryRHSA-2017:2787
- advisoryRHSA-2017:2886
- advisoryhttps://ubuntu.com/security/CVE-2017-3302
- advisoryhttps://ubuntu.com/security/CVE-2017-3305
- advisoryhttps://ubuntu.com/security/CVE-2017-3308
FAQ
Common Questions.
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Pluggable Auth).
Affected: Mysql (Oracle); mysql-5.5 (ubuntu); mysql-5.7 (ubuntu), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including libmysql56client_r18 5.6.36-24.3.3, libmysql56client_r18-32bit 5.6.36-24.3.3, libmysql56client18 5.6.36-24.3.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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