CVE-2006-7227: Buffer Overflow
First published: Wed Nov 07 2007(Updated: )
<a href="https://access.redhat.com/security/cve/CVE-2006-7224">CVE-2006-7224</a> initially described several integer overflows in pcre, all described here: <a href="http://scary.beasts.org/security/CESA-2007-006.html">http://scary.beasts.org/security/CESA-2007-006.html</a> This id should be used to describe issue #1 in that advisory: 1) Integer overflow leading to buffer overflow. pcre_compile: --- /* Compute the size of data block needed and get it, either from malloc or externally provided function. */ size = length + sizeof(real_pcre) + name_count * (max_name_size + 3); re = (real_pcre *)(pcre_malloc)(size); --- Unfortunately, a malicious regex can easily cause large "name_count" and "max_name_size" such that this calculation overflows. Demo: (?P)(?P<0>)(?P<1>)...fill in this sequence...(?P<4293>)
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/pcre | <0:4.5-4.el4_5.4 | 0:4.5-4.el4_5.4 |
| redhat/pcre | <0:6.6-2.el5_1.1 | 0:6.6-2.el5_1.1 |
| PCRE | <=6.6 |
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Reference Links
- http://bugs.gentoo.org/show_bug.cgi?id=198976
- http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html
- http://scary.beasts.org/security/CESA-2007-006.html
- http://secunia.com/advisories/27582
- http://secunia.com/advisories/27741
- http://secunia.com/advisories/27773
- http://secunia.com/advisories/27869
- http://secunia.com/advisories/28406
- http://secunia.com/advisories/28414
- http://secunia.com/advisories/28658
- http://secunia.com/advisories/28714
- http://secunia.com/advisories/28720
- http://secunia.com/advisories/30106
- http://secunia.com/advisories/30155
- http://secunia.com/advisories/30219
- http://security.gentoo.org/glsa/glsa-200711-30.xml
- http://security.gentoo.org/glsa/glsa-200801-02.xml
- http://security.gentoo.org/glsa/glsa-200801-18.xml
- http://security.gentoo.org/glsa/glsa-200801-19.xml
- http://security.gentoo.org/glsa/glsa-200805-11.xml
- http://support.avaya.com/elmodocs2/security/ASA-2007-493.htm
- http://www.debian.org/security/2008/dsa-1570
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:030
- http://www.novell.com/linux/security/advisories/2007_62_pcre.html
- http://www.pcre.org/changelog.txt
- http://www.redhat.com/support/errata/RHSA-2007-1052.html
- http://www.securityfocus.com/bid/26462
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10408
- https://access.redhat.com/security/cve/CVE-2006-7224
- http://rhn.redhat.com/errata/RHSA-2007-1052.html
- https://bugzilla.redhat.com/show_bug.cgi?id=383341
- https://www.cve.org/CVERecord?id=CVE-2006-7227 https://nvd.nist.gov/vuln/detail/CVE-2006-7227
- https://access.redhat.com/errata/RHSA-2007:1052
- https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2006-7227.json
Frequently Asked Questions
What is the severity of CVE-2006-7227?
CVE-2006-7227 is classified as a high-severity vulnerability due to the integer overflow issues in PCRE.
How do I fix CVE-2006-7227?
To fix CVE-2006-7227, update the pcre package to versions 0:4.5-4.el4_5.4 or 0:6.6-2.el5_1.1.
Which versions of PCRE are affected by CVE-2006-7227?
Versions of PCRE up to and including 6.6 are affected by CVE-2006-7227.
What type of vulnerability is CVE-2006-7227?
CVE-2006-7227 is an integer overflow vulnerability that can lead to potential code execution.
Is CVE-2006-7227 remote exploitable?
CVE-2006-7227 may be remotely exploitable depending on how the PCRE library is used in applications.
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- version/pcre/6.6