SB2018082224 - Improper input validation in clamav (Alpine package)
Published: August 22, 2018
Security Bulletin ID
SB2018082224
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-14680)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The vulnerability exists due to the chmd_read_headers() function, as defined in the mspack/chmd.c source code file of the affected software, does not reject blank CHM filenames. A local attacker can submit a CHM file with a blank filename and cause the service to crash.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=5412962cc2f34d4bb2f2996918e1384eda223946
- https://git.alpinelinux.org/aports/commit/?id=b34c6efbc0f5941d4099a372533f14885013e380
- https://git.alpinelinux.org/aports/commit/?id=be88110b3119e3783d97ab6f259ad7b346dc6203
- https://git.alpinelinux.org/aports/commit/?id=fdb3e21e9339a763b32a76726cb3ee43fd4e8772
- https://git.alpinelinux.org/aports/commit/?id=16c239033cd6df0b08dd57960724a9940cceba82
- https://git.alpinelinux.org/aports/commit/?id=214cb233279c7ef0221557f24d0d0af79a46d3b7
- https://git.alpinelinux.org/aports/commit/?id=3e3519a996d44c6d478d4e1d47cc6360a93da3c3
- https://git.alpinelinux.org/aports/commit/?id=babf8851105592d4bc46ac85ef56f396f9e76c9f
- https://git.alpinelinux.org/aports/commit/?id=c854dba4b5bde88f1673002621ab2bb8e0f66d4b