===================================================================== CERT-Renater Note d'Information No. 2022/VULN219 _____________________________________________________________________ DATE : 29/06/2022 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Firefox versions prior to 102, ESR 91.11, for iOS 102. ===================================================================== https://www.mozilla.org/en-US/security/advisories/mfsa2022-24/ https://www.mozilla.org/en-US/security/advisories/mfsa2022-25/ _____________________________________________________________________ Mozilla Foundation Security Advisory 2022-24 Security Vulnerabilities fixed in Firefox 102 Announced June 28, 2022 Impact high Products Firefox Fixed in Firefox 102 Note: While Bug 1771084 does not represent a specific vulnerability that was fixed, we recommend anyone rebasing patches to include it. 102 branch: Patch 1 and 2. 91 Branch: Patch 1 and 2 (Despite saying Parts 2 and 3, there is no Part 1) #CVE-2022-34479: A popup window could be resized in a way to overlay the address bar with web content Reporter Irvan Kurniawan Impact high Description A malicious website that could create a popup could have resized the popup to overlay the address bar with its own content, resulting in potential user confusion or spoofing attacks. This bug only affects Firefox for Linux. Other operating systems are unaffected. References Bug 1745595 #CVE-2022-34470: Use-after-free in nsSHistory Reporter Armin Ebert Impact high Description Navigations between XML documents may have led to a use-after-free and potentially exploitable crash. References Bug 1765951 #CVE-2022-34468: CSP sandbox header without `allow-scripts` can be bypassed via retargeted javascript: URI Reporter Armin Ebert Impact high Description An iframe that was not permitted to run scripts could do so if the user clicked on a javascript: link. References Bug 1768537 #CVE-2022-34482: Drag and drop of malicious image could have led to malicious executable and potential code execution Reporter Attila Suszter Impact moderate Description An attacker who could have convinced a user to drag and drop an image to a filesystem could have manipulated the resulting filename to contain an executable extension, and by extension potentially tricked the user into executing malicious code. While very similar, this is a separate issue from CVE-2022-34483. References Bug 845880 #CVE-2022-34483: Drag and drop of malicious image could have led to malicious executable and potential code execution Reporter Eduardo Braun Prado Impact moderate Description An attacker who could have convinced a user to drag and drop an image to a filesystem could have manipulated the resulting filename to contain an executable extension, and by extension potentially tricked the user into executing malicious code. While very similar, this is a separate issue from CVE-2022-34482. References Bug 1335845 #CVE-2022-34476: ASN.1 parser could have been tricked into accepting malformed ASN.1 Reporter Gustavo Grieco Impact moderate Description ASN.1 parsing of an indefinite SEQUENCE inside an indefinite GROUP could have resulted in the parser accepting malformed ASN.1. References Bug 1387919 #CVE-2022-34481: Potential integer overflow in ReplaceElementsAt Reporter Ronald Crane Impact moderate Description In the nsTArray_Impl::ReplaceElementsAt() function, an integer overflow could have occurred when the number of elements to replace was too large for the container. References Bug 1497246 Bug 1483699 #CVE-2022-34474: Sandboxed iframes could redirect to external schemes Reporter Amazon Malvertising Team Impact moderate Description Even when an iframe was sandboxed with allow-top-navigation-by-user-activation, if it received a redirect header to an external protocol the browser would process the redirect and prompt the user as appropriate. References Bug 1677138 #CVE-2022-34469: TLS certificate errors on HSTS-protected domains could be bypassed by the user on Firefox for Android Reporter Peter Gerber Impact moderate Description When a TLS Certificate error occurs on a domain protected by the HSTS header, the browser should not allow the user to bypass the certificate error. On Firefox for Android, the user was presented with the option to bypass the error; this could only have been done by the user explicitly. This bug only affects Firefox for Android. Other operating systems are unaffected. References Bug 1721220 #CVE-2022-34471: Compromised server could trick a browser into an addon downgrade Reporter Rob Wu Impact moderate Description When downloading an update for an addon, the downloaded addon update's version was not verified to match the version selected from the manifest. If the manifest had been tampered with on the server, an attacker could trick the browser into downgrading the addon to a prior version. References Bug 1766047 #CVE-2022-34472: Unavailable PAC file resulted in OCSP requests being blocked Reporter Laurent Bigonville Impact moderate Description If there was a PAC URL set and the server that hosts the PAC was not reachable, OCSP requests would have been blocked, resulting in incorrect error pages being shown. References Bug 1770123 #CVE-2022-34478: Microsoft protocols can be attacked if a user accepts a prompt Reporter Gijs Impact moderate Description The ms-msdt, search, and search-ms protocols deliver content to Microsoft applications, bypassing the browser, when a user accepts a prompt. These applications have had known vulnerabilities, exploited in the wild (although we know of none exploited through Firefox), so in this release Firefox has blocked these protocols from prompting the user to open them. This bug only affects Firefox on Windows. Other operating systems are unaffected. References Bug 1773717 #CVE-2022-2200: Undesired attributes could be set as part of prototype pollution Reporter Manfred Paul via Trend Micro's Zero Day Initiative Impact moderate Description If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. References Bug 1771381 #CVE-2022-34480: Free of uninitialized pointer in lg_init Reporter Ronald Crane Impact low Description Within the lg_init() function, if several allocations succeed but then one fails, an uninitialized pointer would have been freed despite never being allocated. References Bug 1454072 #CVE-2022-34477: MediaError message property leaked information on cross-origin same-site pages Reporter jannis Impact low Description The MediaError message property should be consistent to avoid leaking information about cross-origin resources; however for a same-site cross-origin resource, the message could have leaked information enabling XS-Leaks attacks. References Bug 1731614 #CVE-2022-34475: HTML Sanitizer could have been bypassed via same-origin script via use tags Reporter Gareth Heyes Impact low Description SVG tags that referenced a same-origin document could have resulted in script execution if attacker input was sanitized via the HTML Sanitizer API. This would have required the attacker to reference a same-origin JavaScript file containing the script to be executed. References Bug 1757210 #CVE-2022-34473: HTML Sanitizer could have been bypassed via use tags Reporter Armin Ebert Impact low Description The HTML Sanitizer should have sanitized the href attribute of SVG tags; however it incorrectly did not sanitize xlink:href attributes. References Bug 1770888 #CVE-2022-34484: Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11 Reporter Mozilla developers and community Impact high Description The Mozilla Fuzzing Team reported potential vulnerabilities present in Firefox 101 and Firefox ESR 91.10. Some of these bugs showed evidence of JavaScript prototype or memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11 #CVE-2022-34485: Memory safety bugs fixed in Firefox 102 Reporter Mozilla developers and community Impact moderate Description Mozilla developers Bryce Seager van Dyk and the Mozilla Fuzzing Team reported potential vulnerabilities present in Firefox 101. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References Memory safety bugs fixed in Firefox 102 _____________________________________________________________________ Security Vulnerabilities fixed in Firefox ESR 91.11 Announced June 28, 2022 Impact high Products Firefox ESR Fixed in Firefox ESR 91.11 Note: While Bug 1771084 does not represent a specific vulnerability that was fixed, we recommend anyone rebasing patches to include it. 102 branch: Patch 1 and 2. 91 Branch: Patch 1 and 2 (Despite saying Parts 2 and 3, there is no Part 1) #CVE-2022-34479: A popup window could be resized in a way to overlay the address bar with web content Reporter Irvan Kurniawan Impact high Description A malicious website that could create a popup could have resized the popup to overlay the address bar with its own content, resulting in potential user confusion or spoofing attacks. This bug only affects Firefox for Linux. Other operating systems are unaffected. References Bug 1745595 #CVE-2022-34470: Use-after-free in nsSHistory Reporter Armin Ebert Impact high Description Navigations between XML documents may have led to a use-after-free and potentially exploitable crash. References Bug 1765951 #CVE-2022-34468: CSP sandbox header without `allow-scripts` can be bypassed via retargeted javascript: URI Reporter Armin Ebert Impact high Description An iframe that was not permitted to run scripts could do so if the user clicked on a javascript: link. References Bug 1768537 #CVE-2022-34481: Potential integer overflow in ReplaceElementsAt Reporter Ronald Crane Impact moderate Description In the nsTArray_Impl::ReplaceElementsAt() function, an integer overflow could have occurred when the number of elements to replace was too large for the container. References Bug 1497246 #CVE-2022-31744: CSP bypass enabling stylesheet injection Reporter Gertjan Impact moderate Description An attacker could have injected CSS into stylesheets accessible via internal URIs, such as resource:, and in doing so bypass a page's Content Security Policy. References Bug 1757604 #CVE-2022-34472: Unavailable PAC file resulted in OCSP requests being blocked Reporter Laurent Bigonville Impact moderate Description If there was a PAC URL set and the server that hosts the PAC was not reachable, OCSP requests would have been blocked, resulting in incorrect error pages being shown. References Bug 1770123 #CVE-2022-34478: Microsoft protocols can be attacked if a user accepts a prompt Reporter Gijs Impact moderate Description The ms-msdt, search, and search-ms protocols deliver content to Microsoft applications, bypassing the browser, when a user accepts a prompt. These applications have had known vulnerabilities, exploited in the wild (although we know of none exploited through Firefox), so in this release Firefox has blocked these protocols from prompting the user to open them. This bug only affects Firefox on Windows. Other operating systems are unaffected. References Bug 1773717 #CVE-2022-2200: Undesired attributes could be set as part of prototype pollution Reporter Manfred Paul via Trend Micro's Zero Day Initiative Impact moderate Description If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. References Bug 1771381 #CVE-2022-34484: Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11 Reporter Mozilla developers and community Impact high Description The Mozilla Fuzzing Team reported potential vulnerabilities present in Firefox 101 and Firefox ESR 91.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11 _____________________________________________________________________ Security Vulnerabilities fixed in Firefox for iOS 102 Announced June 29, 2022 Impact moderate Products Firefox for iOS Fixed in Firefox for iOS 102 #CVE-2022-31746: Privileged internal URL protection could be bypassed through referrer header. Reporter Muneaki Nishimura Impact moderate Description Internal URLs are protected by a secret UUID key, which could have been leaked to web page through the Referrer header. References Bug 1654416 ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================