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PCRE Multiple Vulnerabilities
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Secunia Advisory:
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SA27543
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Release Date:
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2007-11-06
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Critical:
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Moderately critical
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Impact:
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Exposure of sensitive information
DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | PCRE 6.x
PCRE 7.x
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| | CVE reference: | CVE-2007-1659 (Secunia mirror)
CVE-2007-1660 (Secunia mirror)
CVE-2007-1661 (Secunia mirror)
CVE-2007-1662 (Secunia mirror)
CVE-2007-4766 (Secunia mirror)
CVE-2007-4767 (Secunia mirror)
CVE-2007-4768 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in PCRE, which can be exploited by malicious people to cause a DoS (Denial of Service), disclose sensitive information, or potentially compromise an application using the library.
1) An error exists in the processing of "\Q\E" sequences with orphan "\E" codes. This can be exploited to desynchronize the compiled regular expression and execute corrupted bytecode.
2) An error in the processing of multiple unspecified character classes can be exploited to trigger an insufficient memory allocation.
3) An error exists in the processing of multiple "\X?\d" and "\P{L}?\d" patterns in non-UTF-8 mode. This can be exploited to crash an affected process or to disclose restricted memory.
4) An error exists in multiple unspecified routines when searching for unmatched brackets or parentheses. This can be exploited to crash an affected application via a specially crafted string.
5) Some integer overflow errors when processing escape sequences can be exploited to crash an affected application or potentially cause heap-based buffer overflows.
6) Some errors exist in the processing of "\P" and "\P{x}" sequences. This can be exploited to cause heap-based buffer overflows or trigger the execution of infinite loops.
7) An error in the optimization of character classes containing a lone unicode sequence can be exploited to cause a heap-based buffer overflow.
The vulnerabilities are reported in versions prior to 7.3.
Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.
Solution:
Update to version 7.3 or later.
Provided and/or discovered by:
Debian credits Tavis Ormandy, Google Security Team
Original Advisory:
http://lists.debian.org/debian-securi...-security-announce-2007/msg00177.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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4 Related Secunia Security Advisories
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1. PCRE pcre_compile.c Buffer Overflow Vulnerability
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2. PCRE Character Class Buffer Overflow
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3. PCRE Regex Parsing Multiple Vulnerabilities
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4. PCRE Quantifier Values Integer Overflow Vulnerability
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