sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x befo
sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x before 5.2.12, 5.3.x before 5.3.6, and 5.5.x before 5.5.23, when running in certain environments with certain implementations of the memcmp function, allows remote attackers to bypass authentication by repeatedly authenticating with the same incorrect password, which eventually causes a token comparison to succeed due to an improperly-checked return value.
- Published
- Jun 26, 2012
- Updated
- Jun 16, 2026
- EPSS
- 96.5% · 100th percentile
- CWE
- CWE-287
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
49
Plan
Add it to your regular patch cycle.
- CVSS
- 20 / 40 · 5.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 29 / 30 · 96.5%
Affected systems
Using mysql? Add it to your stack and be the first to know about CVEs like this one. (MySQL)
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- oracle mysql5.1.51
- oracle mysql5.1.52
- oracle mysql5.1.53
- oracle mysql5.1.54
- oracle mysql5.1.55
- oracle mysql5.1.56
- oracle mysql5.1.57
- oracle mysql5.1.58
- oracle mysql5.1.59
- oracle mysql5.1.60
- oracle mysql5.1.61
- oracle mysql5.5.10
- oracle mysql5.5.11
- oracle mysql5.5.12
- oracle mysql5.5.13
- oracle mysql5.5.14
- oracle mysql5.5.15
- oracle mysql5.5.16
- oracle mysql5.5.17
- oracle mysql5.5.18
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:6.0 | mysql-5.1 | before 5.1.63-0+squeeze1 | 5.1.63-0+squeeze1 |
| Red Hat:enterprise_linux:6::client | mysql | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-bench | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-debuginfo | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-devel | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-embedded | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-embedded-devel | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-libs | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-server | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
| Red Hat:enterprise_linux:6::client | mysql-test | before 0:5.1.66-1.el6_3 | 0:5.1.66-1.el6_3 |
Same product
oracle: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-6662Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before 10.0.27, and 10.1.x before59Plan
- CVE-2017-3599Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Pluggable Auth).57Plan
- CVE-2009-4484Multiple stack-based buffer overflows in the CertDecoder::GetName function in src/asn.cpp in TaoCrypt in yaSSL before 1.9.9, as used in mysq51Plan
- CVE-2022-21489Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).49Plan
- CVE-2022-21279Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).49Plan
- CVE-2003-0150MySQL 3.23.55 and earlier creates world-writeable files and allows mysql users to gain root privileges by using the "SELECT * INFO OUTFILE" 49Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:mysql-5.1 | 5.1.63-0+squeeze1 · Debian:6.0 | Package registry (OSV) |
| red hat:mysql | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-bench | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-debuginfo | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-devel | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-embedded | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-embedded-devel | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-libs | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-server | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:mysql-test | 0:5.1.66-1.el6_3 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×5
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2012-06-12 |
| Metasploit module | auxiliary/scanner/mysql/mysql_authbypass_hashdumpMySQL Authentication Bypass Password Dumpauxiliary | 2012-06-09 |
| Nuclei detection template | Nuclei template CVE-2012-2122 | — |
| Proof-of-concept repository on GitHub | stars:1 | 2013-05-09 |
| Proof-of-concept repository on GitHub | stars:1 | 2020-06-24 |
| Proof-of-concept repository on GitHub | stars:0 | 2023-12-01 |
| Proof-of-concept repository on GitHub | stars:0 | 2025-11-24 |
| Proof-of-concept repository on GitHub | stars:0 | 2026-07-06 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Metasploit-18 d
- First PoC-15 d
- Published
- TodaySep 30, 2026+5209 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- High
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-287 · Improper AuthenticationCVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P
nvd-primary
Root cause
Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.
The bug in code
The whole CWE-287 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);Fixed
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Authentication AbuseCAPEC-114Medium
- Authentication BypassCAPEC-115Medium
- Identity SpoofingCAPEC-151likelihood: Medium · Medium
- Fake the Source of DataCAPEC-194Medium
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- Utilizing REST's Trust in the System Resource to Obtain Sensitive DataCAPEC-57likelihood: Medium · Very High
- Session HijackingCAPEC-593likelihood: High · Very High
- Token ImpersonationCAPEC-633Medium
ATT&CK techniques
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- kb.askmonty.org/en/mariadb-5162-release-notes/
- lists.opensuse.org/opensuse-security-announce/2012-08/msg00007.html
- seclists.org/oss-sec/2012/q2/493
- secunia.com/advisories/49417
- secunia.com/advisories/53372
- security.gentoo.org/glsa/glsa-201308-06.xml
- securitytracker.com/id?1027143
- www.exploit-db.com/exploits/19092
Vendor advisories and official records. Exploit/PoC links are deliberately left out.