SARA / Free Tools / CVE / CVE-2019-11691

CVE-2019-11691 — A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR)

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67,

CVSS
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EPSS
0.52% (top 33.60%)
CWE
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Published
2019-07-23T13:23:12.000Z
Last modified
2024-08-04T23:03:32.349Z
CVSS vector
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01What is this vulnerability?

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

02Affected products

VendorProductVersions
MozillaThunderbirdunspecified
MozillaFirefoxunspecified
MozillaFirefox ESRunspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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