CVE-2017-17805
Published: 20 December 2017
The Salsa20 encryption algorithm in the Linux kernel before 4.14.8 does not correctly handle zero-length inputs, allowing a local attacker able to use the AF_ALG-based skcipher interface (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of service (uninitialized-memory free and kernel crash) or have unspecified other impact by executing a crafted sequence of system calls that use the blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation (arch/x86/crypto/salsa20_glue.c) of Salsa20 were vulnerable.
From the Ubuntu Security Team
It was discovered that the Salsa20 encryption algorithm implementations in the Linux kernel did not properly handle zero-length inputs. A local attacker could use this to cause a denial of service (system crash).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux
Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-38.43)
|
| bionic |
Not vulnerable
(4.15.0-10.11)
|
|
| trusty |
Released
(3.13.0-144.193)
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.4.0-119.143)
|
|
| zesty |
Ignored
(end of life)
|
|
|
Patches:
Introduced by
eb6f13eb9f812f5812ed5d14f241309da369dee6
|
||
|
linux-armadaxp
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-aws
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| trusty |
Released
(4.4.0-1016.16)
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.4.0-1054.63)
|
|
| zesty |
Does not exist
|
|
|
linux-azure
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.13.0-1014.17)
|
|
| zesty |
Does not exist
|
|
|
linux-euclid
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
| zesty |
Does not exist
|
|
|
linux-flo
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
| zesty |
Does not exist
|
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.13.0-1012.16)
|
|
| zesty |
Does not exist
|
|
|
linux-gke
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
| zesty |
Does not exist
|
|
|
linux-goldfish
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Ignored
(end of life, was needed)
|
|
| zesty |
Ignored
(end of life)
|
|
|
linux-grouper
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.13.0-38.43~16.04.1)
|
|
| zesty |
Does not exist
|
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Released
(4.18.0-8.9~18.04.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.13.0-38.43~16.04.1)
|
|
| zesty |
Does not exist
|
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.4.0-1020.25)
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-omap
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-shared
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-linaro-vexpress
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-quantal
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-saucy
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-trusty
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-utopic
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-vivid
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Ignored
(end of life, was needs-triage)
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-wily
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Released
(4.4.0-119.143~14.04.1)
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-maguro
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-mako
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
| zesty |
Does not exist
|
|
|
linux-manta
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-oem
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Not vulnerable
(4.15.0-1002.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.13.0-1022.24)
|
|
| zesty |
Does not exist
|
|
|
linux-qcm-msm
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-1016.17)
|
| bionic |
Not vulnerable
(4.15.0-1006.7)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.4.0-1086.94)
|
|
| zesty |
Ignored
(end of life)
|
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1088.93)
|
| bionic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Released
(4.4.0-1088.93)
|
|
| zesty |
Ignored
(end of life)
|
|
|
linux-ti-omap4
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc4)
|
|
| xenial |
Does not exist
|
|
| zesty |
Does not exist
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e
- https://github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
- https://ubuntu.com/security/notices/USN-3617-1
- https://ubuntu.com/security/notices/USN-3617-2
- https://ubuntu.com/security/notices/USN-3617-3
- https://ubuntu.com/security/notices/USN-3619-1
- https://ubuntu.com/security/notices/USN-3620-1
- https://ubuntu.com/security/notices/USN-3620-2
- https://ubuntu.com/security/notices/USN-3619-2
- https://ubuntu.com/security/notices/USN-3632-1
- https://www.cve.org/CVERecord?id=CVE-2017-17805
- NVD
- Launchpad
- Debian