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.

References

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8

https://www.debian.org/security/2018/dsa-4082

https://www.debian.org/security/2017/dsa-4073

https://usn.ubuntu.com/3632-1/

https://usn.ubuntu.com/3620-2/

https://usn.ubuntu.com/3620-1/

https://usn.ubuntu.com/3619-2/

https://usn.ubuntu.com/3619-1/

https://usn.ubuntu.com/3617-3/

https://usn.ubuntu.com/3617-2/

https://usn.ubuntu.com/3617-1/

https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html

https://github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e

https://access.redhat.com/errata/RHSA-2019:2473

https://access.redhat.com/errata/RHSA-2018:3096

https://access.redhat.com/errata/RHSA-2018:3083

https://access.redhat.com/errata/RHSA-2018:2948

http://www.securityfocus.com/bid/102291

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html

http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3