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CVE-2021-3935 · cross-distro fix matrix

CVE-2021-3935: When PgBouncer is configured to use "cert" authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of TLS certificate verification and encryption. This flaw affects PgBouncer versions prior to 1.16.1.

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3935 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

  • pgbouncer→ fixed in1.15.0-1+deb11u1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y pgbouncer

Debian bookworm

Source: Debian Security Tracker

  • pgbouncer→ fixed in1.16.1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y pgbouncer

Debian trixie

Source: Debian Security Tracker

  • pgbouncer→ fixed in1.16.1-1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y pgbouncer

Alpine v3.20

Source: Alpine secdb

  • pgbouncer→ fixed in1.16.1-r0
    apk update && apk add --upgrade pgbouncer

Alpine v3.21

Source: Alpine secdb

  • pgbouncer→ fixed in1.16.1-r0
    apk update && apk add --upgrade pgbouncer

Alpine edge

Source: Alpine secdb

  • pgbouncer→ fixed in1.16.1-r0
    apk update && apk add --upgrade pgbouncer

Alpine v3.18

Source: Alpine secdb

  • pgbouncer→ fixed in1.16.1-r0
    apk update && apk add --upgrade pgbouncer

Alpine v3.19

Source: Alpine secdb

  • pgbouncer→ fixed in1.16.1-r0
    apk update && apk add --upgrade pgbouncer
Are YOU affected by CVE-2021-3935?

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