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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 (1.0.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=b77ab018b79a00f789b0fb85596b446b08be4c9d (1.0.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=5802758eb480c5f14a768f6a061df1dd20aec8c4 (1.0.1)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=20744f6b40b5ded059a848f66d6ba922f2a62eb3 (1.0.2)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=3884b47b7c255c2e94d9b387ee83c7e8bb981258 (1.0.2)
upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=26aebca74e38ae09f673c2045cc8e2ef762d265a (1.0.2)
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