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When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
41.0.2+build2-0ubuntu142.0+build2-0ubuntu144.0+build3-0ubuntu244.0.1+build1-0ubuntu144.0.2+build1-0ubuntu145.0+build2-0ubuntu145.0.1+build1-0ubuntu145.0.2+build1-0ubuntu146.0+build5-0ubuntu0.16.04.246.0.1+build1-0ubuntu0.16.04.2+65 more71.0+build5-0ubuntu0.16.04.156.0+build6-0ubuntu157.0.1+build2-0ubuntu159.0.1+build1-0ubuntu159.0.2+build1-0ubuntu160.0+build2-0ubuntu160.0.1+build2-0ubuntu0.18.04.160.0.2+build1-0ubuntu0.18.04.161.0+build3-0ubuntu0.18.04.161.0.1+build1-0ubuntu0.18.04.162.0+build2-0ubuntu0.18.04.3+27 more71.0+build5-0ubuntu0.18.04.12:3.15.1-1ubuntu12:3.15.2-12:3.15.3-12:3.15.3.1-12:3.15.3.1-1.12:3.15.3.1-1.1ubuntu12:3.15.4-1ubuntu32:3.15.4-1ubuntu42:3.15.4-1ubuntu52:3.15.4-1ubuntu6+19 more2:3.28.4-0ubuntu0.14.04.5+esm22:3.19.2-1ubuntu12:3.19.2.1-0ubuntu12:3.21-1ubuntu22:3.21-1ubuntu32:3.21-1ubuntu42:3.23-0ubuntu0.16.04.12:3.26.2-0ubuntu0.16.04.22:3.28.4-0ubuntu0.16.04.12:3.28.4-0ubuntu0.16.04.22:3.28.4-0ubuntu0.16.04.3+3 more2:3.28.4-0ubuntu0.16.04.82:3.32-1ubuntu32:3.34-1ubuntu12:3.35-2ubuntu22:3.35-2ubuntu2.12:3.35-2ubuntu2.22:3.35-2ubuntu2.32:3.35-2ubuntu2.52:3.15.1-1ubuntu12:3.15.2-12:3.15.3-12:3.15.3.1-12:3.15.3.1-1.12:3.15.3.1-1.1ubuntu12:3.15.4-1ubuntu32:3.15.4-1ubuntu42:3.15.4-1ubuntu52:3.15.4-1ubuntu6+19 more1:38.3.0+build1-0ubuntu21:38.5.1+build2-0ubuntu11:38.6.0+build1-0ubuntu11:38.7.2+build1-0ubuntu0.16.04.11:38.8.0+build1-0ubuntu0.16.04.11:45.2.0+build1-0ubuntu0.16.04.11:45.3.0+build1-0ubuntu0.16.04.21:45.4.0+build1-0ubuntu0.16.04.11:45.5.1+build1-0ubuntu0.16.04.11:45.7.0+build1-0ubuntu0.16.04.1+20 more1:68.7.0+build1-0ubuntu0.16.04.21:52.4.0+build1-0ubuntu21:52.6.0+build1-0ubuntu11:52.7.0+build1-0ubuntu11:52.8.0+build1-0ubuntu0.18.04.11:52.9.1+build3-0ubuntu0.18.04.11:60.2.1+build1-0ubuntu0.18.04.21:60.4.0+build2-0ubuntu0.18.04.11:60.5.1+build2-0ubuntu0.18.04.11:60.6.1+build2-0ubuntu0.18.04.11:60.7.0+build1-0ubuntu0.18.04.1+6 more1:68.4.1+build1-0ubuntu0.18.04.1Exploitability
AV:NAC:LPR:NUI:RScope
S:UImpact
C:HI:HA:HCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H