Bug 429023 (CVE-2007-4770) - CVE-2007-4770 libicu poor back reference validation
Summary: CVE-2007-4770 libicu poor back reference validation
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2007-4770
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 429706 429707 430232 430233
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-01-16 20:53 UTC by Josh Bressers
Modified: 2019-09-29 12:22 UTC (History)
3 users (show)

Fixed In Version: 3.8-5.fc8
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2008-01-28 14:03:32 UTC
Embargoed:


Attachments (Terms of Use)
An example of icu pattern matching in OOo (7.97 KB, application/vnd.oasis.opendocument.text)
2008-01-17 09:20 UTC, Caolan McNamara
no flags Details
Patch agains ICU 3.8 proposed by Andy Heninger (11.87 KB, patch)
2008-01-18 08:06 UTC, Tomas Hoger
no flags Details | Diff
backported patch (10.48 KB, patch)
2008-01-22 08:59 UTC, Caolan McNamara
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2008:0090 0 normal SHIPPED_LIVE Important: icu security update 2008-01-25 13:28:40 UTC

Description Josh Bressers 2008-01-16 20:53:36 UTC
Will Drewry reported a flaw in the way libicu processes certain regular
expressions.  He reports:

    On regular expression compilation, illegal backreferences may refer to the
    non-existent capture group '0'.  When these are builts, they will result
    in corrupt REStackFrames which will be used at a later point.  Crashes may
    result in out of band reads or writes depending on the regular expression
    being executed.

Comment 3 Caolan McNamara 2008-01-17 09:20:08 UTC
Created attachment 291973 [details]
An example of icu pattern matching in OOo

I figured out how to get OOo to match patterns with the icu regexp stuff.
Attached is a test-case which just tries to match "I am a pattern"

Comment 5 Tomas Hoger 2008-01-18 08:06:42 UTC
Created attachment 292114 [details]
Patch agains ICU 3.8 proposed by Andy Heninger

Comment 8 Caolan McNamara 2008-01-22 08:59:16 UTC
Created attachment 292482 [details]
backported patch

I can't commit to RHEL icu without approved bugzilla ids.

Comment 15 Fedora Update System 2008-01-27 07:13:09 UTC
icu-3.8-5.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 16 Fedora Update System 2008-01-27 07:21:19 UTC
icu-3.6-20.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.