CVE-2010-1866

Publication date 7 May 2010

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

Description

The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.

Read the notes from the security team

Status

Package Ubuntu Release Status
php5 10.04 LTS lucid
Fixed in 5.3.2-1ubuntu4.5
9.10 karmic
Not affected
9.04 jaunty
Not affected
8.04 LTS hardy
Not affected
6.06 LTS dapper
Not affected

Notes

mdeslaur

5.3 only This is MOPS-2010-003

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
php5

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-989-1
    • PHP vulnerabilities
    • 20 September 2010

Other references

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