CVE-2017-17805: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2017-17805 is a high (CVSS 7.8) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38.4% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 20 · Related 13Timeline
- 20-12-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.44%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.45% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu17 products
- linux< 3.13.0-144.193 | < 4.4.0-119.143
- linux-aws< 4.4.0-1016.16 | < 4.4.0-1054.63
- linux-azure< 4.13.0-1014.17
- linux-azure-fdeAll versions (No fix recorded)
- linux-fips< 4.4.0-1008.10
Suse3 products
- linux_enterprise_desktop12:sp2 | 12:sp3
- linux_enterprise_server11:extra | 11:sp4 | 12:sp2 | 12:sp3
- linux_enterprise_server_for_raspberry_pi12:sp2
Debian2 products
- linux< 4.14.7-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 17.10
Linux1 product
- linux_kernel≥ 2.6.25, < 3.2.97 | ≥ 3.3, < 3.16.52 | ≥ 3.17, < 3.18.89 | ≥ 3.19, < 4.1.49 | ≥ 4.2, < 4.4.107 | ≥ 4.5, < 4.9.71 | ≥ 4.10, < 4.14.8
Opensuse1 product
- leapEOL42.2
Opensuse_project1 product
- leap42.3
7 vendors · 26 products
References
35 links
- lists.debian.org/debian-lts-announce/2018/01/msg00004.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
Show all 35 references
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8X Refsource CONFIRMIssue TrackingRelease NotesREPORT
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
- github.com/torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500eX Refsource CONFIRMPatchREPORT
- lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory