CVE-2009-0689

What it is

Array index error in the (1) dtoa implementation in dtoa.c (aka pdtoa.c) and the (2) gdtoa (aka new dtoa) implementation in gdtoa/misc.c in libc, as used in multiple operating systems and products including in FreeBSD 6.4 and 7.2, NetBSD 5.0, OpenBSD 4.5, Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4, K-Meleon 1.5.3, SeaMonkey 1.1.8, and other products, allows context-dependent attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a large precision value in the format argument to a printf function, which triggers incorrect memory allocation and a heap-based buffer overflow during conversion to a floating-point number.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

29.4% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2009-07-01 13:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:05 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 29.4% in the next 30 days (EPSS).
• Severity: 6.8 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-07-01 13:00 UTC

Last modified

2026-06-16 23:05 UTC

Exploit probability

29.4% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• k-meleon Project k-meleon 1.5.3
• Mozilla Firefox 3.0.1
• Mozilla Firefox 3.0.2
• Mozilla Firefox 3.0.3
• Mozilla Firefox 3.0.4
• Mozilla Firefox 3.0.5
• Mozilla Firefox 3.0.6
• Mozilla Firefox 3.0.7

Attack profile CVSS 2.0 · 6.8

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-0689.md and follow it. Check whether this project is affected by CVE-2009-0689. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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