Multiple Mozilla products contain a use-after-free flaw in the nsFrameList::FirstChild function. The issue is triggered when a remote attacker manipulates the size of a container within an absolutely position element inside of a column. This may allow a remote attacker cause a denial of service or to potentially execute arbitrary code.
Remote / Network Access
Loss of Integrity
Upgrade Firefox or Thunderbird to version 13 or 10.0.5 for ESR, and SeaMonkey to version 2.10 or higher, as they have been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
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