Java applets can be used to read sensitive information

Once a Java applet has been cached, if a page can predict the cache path for that applet, it can load the applet from the cache, causing it to run in the context of the local machine. This allows it to read other cache files on the computer or perform other normally more restrictive actions. Thes...

Fast Forward can allow cross-site scripting

If a link that uses a JavaScript URL triggers Opera's Fast Forward feature, when the user activates Fast Forward, the script should run on the current page. When a page is held in a frame, the script is incorrectly executed on the outermost page, not the page where the URL was located. This can b...

Vulnerability in createSVGTransformFromMatrix (JavaScript, SVG)

Passing an incorrect object to createSVGTransformFromMatrixcan crash Opera and enable arbitrary code execution. Users who have disabled JavaScript are not affected...

Representation of DOM attribute values could allow cross-site scripting

When XML is imported into a document, its attribute values are not correctly presented to the DOM. This can allow their values to bypass sanitization filters. If these values are used as document content, they may in some cases allow scripts to be inserted...

Sites can change framed content on other sites

Scripts are able to change the addresses of framed pages that come from the same site. Due to a flaw in the way that Opera checks what frames can be changed, a site can change the address of frames on other sites inside any window that it has opened. This allows sites to open pages from other...

Rich editing allows cross domain scripting

Rich editing using designMode allows page contents to be edited. Pages can use this ability to inject scripts into pages from other domains. This allows cross domain scripting...

Registering Opera as a protocol handler can allow it to be used to execute arbitrary code

When an application attempts to access a URL that uses a protocol that it does not understand, it may choose to pass the URL to a registered handler for that protocol. If that registered handler is Opera, it will be started, passing the URL to open. Some external applications do not ensure that t...

Sites can change framed content on other sites – Opera Security Advisories

Sites can change framed content on other sites – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Highly Severe Problem Description Scripts are able to change the addresses of framed pages that come from the same site. Due to a flaw in the way that Opera checks what frames can be...

Java applets can be used to read sensitive information – Opera Security Advisories

Java applets can be used to read sensitive information – Opera Security Advisories OPCOM Team | December 16, 2008 Severity: Highly Severe Problem Description Once a Java applet has been cached, if a page can predict the cache path for that applet, it can load the applet from the cache, causing it...

Registering Opera as a protocol handler can allow it to be used to execute arbitrary code – Opera Security Advisories

Registering Opera as a protocol handler can allow it to be used to execute arbitrary code – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Extremely Severe Problem Description When an application attempts to access a URL that uses a protocol that it does not understand, it may...

Malformed JPEG headers can be used to execute arbitrary code – Opera Security Advisories

Malformed JPEG headers can be used to execute arbitrary code – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Extremely Severe Problem Description A specially crafted JPEG header can cause Opera to crash, allowing execution of arbitrary code. Opera’s Response Opera Software has...

Representation of DOM attribute values could allow cross-site scripting – Opera Security Advisories

Representation of DOM attribute values could allow cross-site scripting – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Moderately Severe Problem Description When XML is imported into a document, its attribute values are not correctly presented to the DOM. This can allow their...

canvas functions can reveal data from random places in memory – Opera Security Advisories

canvas functions can reveal data from random places in memory – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Moderately severe Problem description There is a flaw in the way that certain canvas functions are handled, that can cause the canvas to be painted with very small...

History Search can be used to execute arbitrary code – Opera Security Advisories

History Search can be used to execute arbitrary code – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Extremely Severe Problem Description When certain parameters are passed to Opera’s History Search, they can cause content not to be correctly sanitized. This can allow scripts ...

Image properties can be used to execute scripts – Opera Security Advisories

Image properties can be used to execute scripts – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Highly Severe Problem Description Image properties can contain custom comments. When displaying the image properties, Opera can be tricked into treating the comments as script. This...

Character Encoding Inheritance in iframes Can Enable Cross-Site Scripting – Opera Security Advisories

Character Encoding Inheritance in iframes Can Enable Cross-Site Scripting – Opera Security Advisories OPCOM Team | December 16, 2008 Severity Moderate Problem description Pages displayed inside an iframe will inherit the character encodingof the parent page, unless they specify their own characte...

A JPEG image with a malformed header can crash Opera – Opera Security Advisories

A JPEG image with a malformed header can crash Opera – Opera Security Advisories OPCOM Team | December 16, 2008 Summary A JPEG image with a malformed header can crash Opera, and causearbitrary code to be run. Severity Moderate Problem description A specially crafted DHT marker in the JPEG file...

Image properties can be used to execute scripts

Image properties can contain custom comments. When displaying the image properties, Opera can be tricked into treating the comments as script. This can cause the script to be run in the wrong security context...

canvas functions can reveal data from random places in memory

There is a flaw in the way that certain canvas functions are handled, that can cause the canvas to be painted with very small amounts of data constructed from random memory. The resulting canvas image can be read and analyzed by JavaScript, so an attacker can get random samples of the user's...

A JPEG image with a malformed header can crash Opera

A specially crafted DHT marker in the JPEG file header can causea heap overflow. The malformed image alone will only cause a crash. To exploitthe flaw, the computer's memory must first be filled up withcode of the attacker's choice. This is not trivial to do reliably,so attempted attacks will oft...

Feed links can link to local files

As a security precaution, Opera does not allow Web pages to link to files on the user's local disk. However, a flaw exists that allows Web pages to link to feed source files on the user's computer. Suitable detection of JavaScript events and appropriate manipulation can unreliably allow a script ...

Resized canvas patterns can cause Opera to execute arbitrary code

HTML CANVAS elements can use scaled images as patterns. With suitable scaling manipulation of the image, a script can cause Opera to crash. This crash can sometimes cause memory corruption. To inject code, additional techniques will have to be employed...

Newsfeed prompt can cause Opera to execute arbitrary code

When Opera encounters a newsfeed source on a Web page, it prompts to add the source as a newsfeed. A script can manipulate the feed source in a way that can cause Opera to crash. The crash is caused by an erroneous memory access. To inject code, additional techniques will have to be employed...

History Search can be used to execute arbitrary code

When certain parameters are passed to Opera's History Search, they can cause content not to be correctly sanitized. This can allow scripts to be injected into the History Search results page. Such scripts can then run with elevated privileges and interact with Opera's configuration, allowing them...

Built-in XSLT templates can allow cross-site scripting

Built-in XSLT templates incorrectly handle escaped content and can cause it to be treated as markup. If a site accepts content from untrusted users, which it then displays using XSLT as escaped strings, this can allow scripted markup to be injected. The scripts will then be executed in the securi...

Script injection in feed preview can reveal contents of unrelated news feeds – Opera Security Advisories

Script injection in feed preview can reveal contents of unrelated news feeds – Opera Security Advisories OPCOM Team | December 15, 2008 Severity Highly Severe Problem Description When Opera is previewing a news feed, some scripted URLs are not correctly blocked. These can execute scripts which ar...

Manipulating text input contents can allow execution of arbitrary code – Opera Security Advisories

Manipulating text input contents can allow execution of arbitrary code – Opera Security Advisories OPCOM Team | December 15, 2008 Severity Extremely Severe Problem Description Manipulating certain text-area contents can cause a buffer overflow, which may be exploited to execute arbitrary code...

Manipulating text input contents can allow execution of arbitrary code

Manipulating certain text-area contents can cause a buffer overflow, which may be exploited to execute arbitrary code...

Script injection in feed preview can reveal contents of unrelated news feeds

When Opera is previewing a news feed, some scripted URLs are not correctly blocked. These can execute scripts which are able to subscribe the user to any feed URL that the attacker chooses, and can also view the contents of any feeds that the user is subscribed to. These may contain sensitive...

HTML parsing flaw can cause Opera to execute arbitrary code

Certain HTML constructs can cause the resulting DOM to change unexpectedly, which triggers a crash. To inject code, additional techniques will have to be employed...

Long hostnames in file: URLs can cause execution of arbitrary code – Opera Security Advisories

Long hostnames in file: URLs can cause execution of arbitrary code – Opera Security Advisories OPCOM Team | December 15, 2008 Severity Highly Severe Problem Description Exceptionally long host names in file: URLs can cause a buffer overflow, which may be exploited to execute arbitrary code. Remot...

Long hostnames in file: URLs can cause execution of arbitrary code

Exceptionally long host names in file: URLs can cause a buffer overflow, which may be exploited to execute arbitrary code. Remote Web pages cannot refer to file: URLs, so successful exploitation involves tricking users into manually opening the exploit URL, or a local file that refers to it...

Built-in XSLT templates can allow cross-site scripting – Opera Security Advisories

Built-in XSLT templates can allow cross-site scripting – Opera Security Advisories OPCOM Team | December 15, 2008 Severity Highly Severe Problem Description Built-in XSLT templates incorrectly handle escaped content and can cause it to be treated as markup. If a site accepts content from untruste...

HTML parsing flaw can cause Opera to execute arbitrary code – Opera Security Advisories

HTML parsing flaw can cause Opera to execute arbitrary code – Opera Security Advisories OPCOM Team | December 15, 2008 Severity Extremely Severe Problem Description Certain HTML constructs can cause the resulting DOM to change unexpectedly, which triggers a crash. To inject code, additional...

Pages held in frames are able to change the location of pages in unrelated frames on the parent page

Pages from different sources held on the same parent page should not be able to modify the locations of each other. In affected Opera versions, if a page contains frames from both a trusted but not secured, and an untrusted source, the untrusted page is able to replace the contents of a named...

Pages held in frames are able to change the location of pages in unrelated frames on the parent page – Opera Security Advisories

Pages held in frames are able to change the location of pages in unrelated frames on the parent page – Opera Security Advisories OPCOM Team | June 11, 2008 Severity: Less Severe Problem Description: Pages from different sources held on the same parent page should not be able to modify the locatio...

Certain characters can obscure the page address

When a page address contains certain characters, they can cause the page address text to be misplaced. In some cases, this could make characters be indistinguishable from each other, allowing some site addresses to look like other site addresses...

Images can be read cross-domain with canvas – Opera Security Advisories

Images can be read cross-domain with canvas – Opera Security Advisories OPCOM Team | June 9, 2008 Severity: Less Severe Problem Description HTML CANVAS elements can use images as patterns, and that image data is made available to scripts. When the images are retrieved from other Web sites, the...

Images can be read cross-domain with canvas

HTML CANVAS elements can use images as patterns, and that image data is made available to scripts. When the images are retrieved from other Web sites, the image data should no longer be available to scripts. A flaw exists in the way that Opera checks for the source of these images. Suitable...

Certain characters can obscure the page address – Opera Security Advisories

Certain characters can obscure the page address – Opera Security Advisories OPCOM Team | June 9, 2008 Severity: Less Severe Problem Description When a page address contains certain characters, they can cause the page address text to be misplaced. In some cases, this could make characters be...

Opera security upgrade for Mac OS X – Opera Security Advisories

Opera security upgrade for Mac OS X – Opera Security Advisories OPCOM Team | October 18, 2007 Opera security upgrade for Mac OS X. Severity: Highly Severe Affected Versions Mac OS X system with the Opera Web browser and the Adobe Flash Player 9.0.47.0 and earlier installed. Problem Description...

Opera security upgrade for Mac OS X

Opera 9.24 has a highly recommended security upgrade for users of the Adobe Flash Player 9.0.47.0 and earlier on Mac OS X. A security issue in Adobe Flash Player 9.0.47.0 and earlier running in Opera on Mac OS X has been found. Details about the vulnerability will be disclosed at a later date...

External news readers and e-mail clients can be used to execute arbitrary code – Opera Security Advisories

External news readers and e-mail clients can be used to execute arbitrary code – Opera Security Advisories OPCOM Team | October 16, 2007 External news readers and e-mail clients can be used to execute arbitrary code. Severity: Highly Severe Affected Versions All versions of Opera for Desktop prio...

Scripts can overwrite functions on pages from other domains – Opera Security Advisories

Scripts can overwrite functions on pages from other domains – Opera Security Advisories OPCOM Team | October 16, 2007 Scripts can overwrite functions on pages from other domains. Severity: Highly Severe Affected Versions All versions of Opera for Desktop prior to Opera 9.24. Problem Description...

External news readers and e-mail clients can be used to execute arbitrary code

If a user has configured Opera to use an external newsgroup client or e-mail application, specially crafted Web pages can cause Opera to run that application incorrectly. In some cases this can lead to execution of arbitrary code...

Scripts can overwrite functions on pages from other domains

When accesing frames from different Web sites, specially crafted scripts can bypass the same-origin policy, and overwrite functions from those frames. If scripts on the page then run those functions, this can cause the script of the attacker's choice to run in the context of the target Web site...

a specially crafted JavaScript can make Opera execute arbitrary code

A virtual function call on an invalid pointer that may referencedata crafted by the attacker can be used to execute arbitrary code...

a specially crafted JavaScript can make Opera execute arbitrary code – Opera Security Advisories

a specially crafted JavaScript can make Opera execute arbitrary code – Opera Security Advisories OPCOM Team | August 7, 2007 A specially crafted JavaScript can make Opera execute arbitrary code. Severity: Highly severe Problem description A virtual function call on an invalid pointer that may...

Opera's HTTP authentication cuts off long server names at the end

Opera's HTTP authentication dialog is displayed when the user enters a Web pagethat requires a login name and a password. To inform the user which server itwas that asked for login credentials, the dialog displays the server name.The user has to see the entire server name. A truncated name can be...

Opera’s HTTP authentication cuts off long server names at the end – Opera Security Advisories

Opera’s HTTP authentication cuts off long server names at the end – Opera Security Advisories OPCOM Team | July 19, 2007 Summary Opera’s HTTP authentication dialog cuts off long server name at the right hand end. Severity: Less severe Problem description Opera’s HTTP authentication dialog is...