Описание
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.
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.
Ссылки
- https://nvd.nist.gov/vuln/detail/CVE-2017-17805
- https://github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e
- 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://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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ecaaab5649781c5a0effdaf298a925063020500e
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
- http://www.securityfocus.com/bid/102291
Связанные уязвимости
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.
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.
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.
The Salsa20 encryption algorithm in the Linux kernel before 4.14.8 doe ...
ELSA-2019-2473: kernel security and bug fix update (IMPORTANT)