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CVE-2016-2181

Published: 16 September 2016

The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
artful
Released (1.0.2g-1ubuntu9)
bionic
Released (1.0.2g-1ubuntu9)
cosmic
Released (1.0.2g-1ubuntu9)
disco
Released (1.0.2g-1ubuntu9)
precise
Released (1.0.1-4ubuntu5.37)
trusty
Released (1.0.1f-1ubuntu2.20)
upstream
Released (1.0.2i, 1.0.1u)
xenial
Released (1.0.2g-1ubuntu4.4)
yakkety
Released (1.0.2g-1ubuntu9)
zesty
Released (1.0.2g-1ubuntu9)
Patches:
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=fa75569758298e2930c78989b516cac937118acc
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=b77ab018b79a00f789b0fb85596b446b08be4c9d
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=5802758eb480c5f14a768f6a061df1dd20aec8c4
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=20744f6b40b5ded059a848f66d6ba922f2a62eb3
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=3884b47b7c255c2e94d9b387ee83c7e8bb981258
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=26aebca74e38ae09f673c2045cc8e2ef762d265a
openssl098
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H