CVE-2021-2011 — Improper Update of Reference Count in Oracle Mysql

CWE-911 — Improper Update of Reference CountCWE-416 — Use After FreeCWE-369 — Divide By ZeroCWE-125 — Out-of-bounds ReadCWE-20 — Improper Input ValidationCWE-414 — Missing Lock Check24 documents14 sources
Severity
5.9MEDIUMNVD
EPSS
2.1%
top 15.76%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
MariadbOracle MysqlOracle Corporation Mysql Server+1 more
Timeline
PublishedJan 20
Latest updateJan 27

Description

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are affected are 5.7.32 and prior and 8.0.22 and prior. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Client. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Client. CVSS 3.1 Base Score 5.9 (Availability impacts). C…

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.2 | Impact: 3.6

Affected Packages3 packages

▶NVDoracle/mysql5.7.0 — 5.7.32+1
▶CVEListV5oracle_corporation/mysql_server5.7.32 and prior, 8.0.22 and prior+1
▶NVDmariadb/mariadb5.5.0 — 5.5.61+3

Also affects: Fedora 32, 33

🔴Vulnerability Details

3
GHSA
GHSA-xvch-fv6q-gx5m: Vulnerability in the MySQL Client product of Oracle MySQL (component: C API)↗2022-05-24
▶
OSV
CVE-2021-2011: Vulnerability in the MySQL Client product of Oracle MySQL (component: C API)↗2021-01-20
▶
CVEList
CVE-2021-2011: Vulnerability in the MySQL Client product of Oracle MySQL (component: C API)↗2021-01-20
▶

💥Exploits & PoCs

3
Exploit-DB
vsftpd 2.3.4 - Backdoor Command Execution↗2021-04-12
▶
Nuclei
Clansphere CMS 2011.4 - Cross-Site Scripting
▶
Nuclei
Clansphere CMS 2011.4 - Cross-Site Scripting
▶

📋Vendor Advisories

10
CISA ICS
Festo Didactic SE MES PC↗2026-01-27
▶
Red Hat
kernel: sch_cake: do not call cake_destroy() from cake_init()↗2024-06-19
▶
Red Hat
kernel: bpf: Add oversize check before call kvcalloc()↗2024-05-21
▶
Red Hat
kernel: netfilter: nftables: avoid overflows in nft_hash_buckets()↗2024-02-28
▶
Red Hat
kernel: netfilter: divide error in nft_limit_init↗2024-02-27
▶

💬Community

1
Bugzilla
CVE-2021-46915 kernel: netfilter: divide error in nft_limit_init↗2024-02-27
▶
CVE-2021-2011 — Improper Update of Reference Count | cvebase