Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2007-1661

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
07/11/2007
Last modified:
09/04/2025

Description

Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): Physical

Base Score 2.0
6.40
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:pcre:perl-compatible_regular_expression_library:*:*:*:*:*:*:*:* 7.2 (including)
cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.0:*:*:*:*:*:*:*
cpe:2.3:a:pcre:perl-compatible_regular_expression_library:7.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4.11:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x_server:10.4.11:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools