CVE-2017-7805

Summary

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Affected Software

VendorProductVersion RangeStatus
MozillaFirefoxunspecified < 56affected
MozillaFirefox ESRunspecified < 52.4affected
MozillaThunderbirdunspecified < 52.4affected

Weaknesses

  • Use-after-free in TLS 1.2 generating handshake hashes

ADP Enrichment

CVE Program Container

Additional References

References