What’s Vulnerable › Vulnerabilities

CVE-2015-4054

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-05-23 · updated 2026-06-17
• Weakness: CWE-476

Description

PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packet before a startup packet.

Affected products

• PgBouncer: through 1.5.4

References

• http://www.openwall.com/lists/oss-security/2015/05/22/5
• http://www.securityfocus.com/bid/74751
• https://github.com/pgbouncer/pgbouncer/commit/74d6e5f7de5ec736f71204b7b422af7380c19ac5
• https://github.com/pgbouncer/pgbouncer/commit/edab5be6665b9e8de66c25ba527509b229468573
• https://github.com/pgbouncer/pgbouncer/issues/42
• https://pgbouncer.github.io/changelog.html#pgbouncer-15x
• https://security.gentoo.org/glsa/201701-24
• http://www.openwall.com/lists/oss-security/2015/05/22/5
• http://www.securityfocus.com/bid/74751
• https://github.com/pgbouncer/pgbouncer/commit/74d6e5f7de5ec736f71204b7b422af7380c19ac5
• https://github.com/pgbouncer/pgbouncer/commit/edab5be6665b9e8de66c25ba527509b229468573
• https://github.com/pgbouncer/pgbouncer/issues/42

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