Opera escape heap overflow
| opera-escape-heap-overflow (13458) |  High Risk |
Description:
Opera is vulnerable to a heap overflow, caused by improper handling of escape characters in 'HREF' tags. By creating a malicious Web page containing an 'HREF' tag with multiple escape (%) characters following the server name and hosting the page on a Web site or by sending it to a potential victim as an HTML email, a remote attacker could overflow a buffer and cause the Web browser to crash or execute arbitrary code on a victim's system, once the victim views the malicious page using Opera.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Opera (7.21 or later), available from the Opera Web site. See References.
For Gentoo Linux:
Upgrade to the latest version of opera (7.22 or later), as listed in Gentoo Linux Security Announcement 200311-02. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- @stake, Inc. Security Advisory a102003-1: Opera HREF Escaped Server Name Overflow.
- Opera Web site: Download Opera.
- VulnWatch Mailing List, Mon Oct 20 2003 - 09:39:18 CDT : Opera HREF escaped server name overflow.
- BID-8853: Opera HREF Malformed Server Name Heap Corruption Vulnerability
- CVE-2003-0870: Heap-based buffer overflow in Opera 7.11 and 7.20 allows remote attackers to execute arbitrary code via an HREF with a large number of escaped characters in the server name.
- GLSA-200311-02: Opera: buffer overflows in 7.11 and 7.20
Platforms Affected:
- Gentoo Linux
- Opera Opera Browser 7.11
- Opera Opera Browser 7.20
Reported:
Oct 20, 2003
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