SB2015093002 - Buffer overflow in screen (Alpine package)
Published: September 30, 2015
Security Bulletin ID
SB2015093002
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2015-6806)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The MScrollV function in ansi.c in GNU screen 4.3.1 and earlier does not properly limit recursion, which allows remote attackers to cause a denial of service (stack consumption) via an escape sequence with a large repeat count value.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=9476d27a258f9f927e599c35f0a5c31078d21008
- https://git.alpinelinux.org/aports/commit/?id=ea113dce5a814d0cadd94aaace870c4cb81ff223
- https://git.alpinelinux.org/aports/commit/?id=3d8174d3ef837848a2de5f0a2e8be9add7bb0acc
- https://git.alpinelinux.org/aports/commit/?id=499aebb95280441b58e9c86bc175a9193db6a15f
- https://git.alpinelinux.org/aports/commit/?id=7643bc0b3e5d0688ad99b7322850d20657d7ef9a
- https://git.alpinelinux.org/aports/commit/?id=8d11263cbeddc4c459bcb7874b86fd8646fd1d77