CVE-2017-17805

Description

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2018:3083 third party advisory vendor advisory
https://usn.ubuntu.com/3617-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3619-2/ third party advisory vendor advisory
https://www.debian.org/security/2018/dsa-4082 third party advisory vendor advisory
https://usn.ubuntu.com/3617-3/ third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html third party advisory vendor advisory
https://usn.ubuntu.com/3632-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3620-2/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html third party advisory vendor advisory
http://www.securityfocus.com/bid/102291 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2018:2948 third party advisory vendor advisory
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 issue tracking release notes
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html third party advisory vendor advisory
https://www.debian.org/security/2017/dsa-4073 third party advisory vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e patch
https://usn.ubuntu.com/3617-2/ third party advisory vendor advisory
https://github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e patch
https://usn.ubuntu.com/3620-1/ third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:3096 third party advisory vendor advisory
https://usn.ubuntu.com/3619-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2473 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-17805?
CVE-2017-17805 has been scored as a high severity vulnerability.
How to fix CVE-2017-17805?
To fix CVE-2017-17805, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-17805 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-17805 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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