| Name | CVE-2017-7805 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1118-1, DLA-1138-1, DLA-1153-1, DSA-3987-1, DSA-3998-1, DSA-4014-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 125.0.1-2 | fixed |
| firefox-esr (PTS) | buster | 91.12.0esr-1~deb10u1 | fixed |
| buster (security) | 115.10.0esr-1~deb10u1 | fixed | |
| bullseye | 115.7.0esr-1~deb11u1 | fixed | |
| bullseye (security) | 115.10.0esr-1~deb11u1 | fixed | |
| bookworm | 115.7.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 115.10.0esr-1~deb12u1 | fixed | |
| trixie | 115.8.0esr-1 | fixed | |
| sid | 115.10.0esr-1 | fixed | |
| nss (PTS) | buster | 2:3.42.1-1+deb10u5 | fixed |
| buster (security) | 2:3.42.1-1+deb10u8 | fixed | |
| bullseye (security), bullseye | 2:3.61-1+deb11u3 | fixed | |
| bookworm | 2:3.87.1-1 | fixed | |
| sid, trixie | 2:3.99-1 | fixed | |
| thunderbird (PTS) | buster | 1:91.12.0-1~deb10u1 | fixed |
| buster (security) | 1:115.9.0-1~deb10u1 | fixed | |
| bullseye | 1:115.7.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:115.9.0-1~deb11u1 | fixed | |
| bookworm | 1:115.7.0-1~deb12u1 | fixed | |
| bookworm (security) | 1:115.9.0-1~deb12u1 | fixed | |
| sid | 1:115.9.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| firefox | source | (unstable) | 56.0-1 | |||
| firefox-esr | source | wheezy | 52.4.0esr-2~deb7u1 | DLA-1118-1 | ||
| firefox-esr | source | jessie | 52.4.0esr-1~deb8u1 | DSA-3987-1 | ||
| firefox-esr | source | stretch | 52.4.0esr-1~deb9u1 | DSA-3987-1 | ||
| firefox-esr | source | (unstable) | 52.4.0esr-2 | |||
| nss | source | wheezy | 2:3.26-1+debu7u5 | DLA-1138-1 | ||
| nss | source | jessie | 2:3.26-1+debu8u3 | DSA-3998-1 | ||
| nss | source | stretch | 2:3.26.2-1.1+deb9u1 | DSA-3998-1 | ||
| nss | source | (unstable) | 2:3.33-1 | |||
| thunderbird | source | wheezy | 1:52.4.0-1~deb7u1 | DLA-1153-1 | ||
| thunderbird | source | jessie | 1:52.4.0-1~deb8u1 | DSA-4014-1 | ||
| thunderbird | source | stretch | 1:52.4.0-1~deb9u1 | DSA-4014-1 | ||
| thunderbird | source | (unstable) | 1:52.4.0-1 |
https://hg.mozilla.org/projects/nss/rev/839200ce0943166a079284bdf45dcc37bb672925
https://bugzilla.mozilla.org/show_bug.cgi?id=1377618 (not public)
https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/#CVE-2017-7805
https://www.mozilla.org/en-US/security/advisories/mfsa2017-22/#CVE-2017-7805
https://www.mozilla.org/en-US/security/advisories/mfsa2017-23/#CVE-2017-7805