CVE-2017-17805
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7 Medium
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
9.3%
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.
References
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e
lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
www.securityfocus.com/bid/102291
access.redhat.com/errata/RHSA-2018:2948
access.redhat.com/errata/RHSA-2018:3083
access.redhat.com/errata/RHSA-2018:3096
access.redhat.com/errata/RHSA-2019:2473
github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e
lists.debian.org/debian-lts-announce/2018/01/msg00004.html
usn.ubuntu.com/3617-1/
usn.ubuntu.com/3617-2/
usn.ubuntu.com/3617-3/
usn.ubuntu.com/3619-1/
usn.ubuntu.com/3619-2/
usn.ubuntu.com/3620-1/
usn.ubuntu.com/3620-2/
usn.ubuntu.com/3632-1/
www.debian.org/security/2017/dsa-4073
www.debian.org/security/2018/dsa-4082
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
Related
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7 Medium
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
9.3%