vulnwire
7.5high

CVE-2017-7805

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer.

Published 8 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
3.0%
percentile 88%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

3.05% probability of exploitation in the next 30 days, higher than 88% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Classification

Weakness

References

  • access.redhat.com /errata/RHSA-2017:2832 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • securityfocus.com /bid/101059 · vdb-entry, x_refsource_BID, x_transferred
  • lists.debian.org /debian-lts-announce/2017/11/msg00000.html · mailing-list, x_refsource_MLIST, x_transferred
  • mozilla.org /security/advisories/mfsa2017-22/ · x_refsource_CONFIRM, x_transferred
  • bugzilla.mozilla.org /show_bug.cgi?id=1377618 · x_refsource_CONFIRM, x_transferred
  • securitytracker.com /id/1039465 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • mozilla.org /security/advisories/mfsa2017-21/ · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-4014 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2018-4428296.html · x_refsource_CONFIRM, x_transferred
  • mozilla.org /security/advisories/mfsa2017-23/ · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-3998 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • debian.org /security/2017/dsa-3987 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • security.gentoo.org /glsa/201803-14 · vendor-advisory, x_refsource_GENTOO, x_transferred

Sources

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