Use-after-free in Fedora - CVE-2017-5357
Published: February 17, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39641
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-5357
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
regex.c in GNU ed before 1.14.1 allows attackers to cause a denial of service (crash) via a malformed command, which triggers an invalid free.
Affected software
Fedora
Arch Linux
ed
Arch Linux
ed
How to mitigate CVE-2017-5357
Install update from vendor's website.
ed - update to 1.14.1-1.fc25
External References
- http://www.openwall.com/lists/oss-security/2017/01/12/5
- http://www.openwall.com/lists/oss-security/2017/01/12/6
- http://www.openwall.com/lists/oss-security/2017/01/12/7
- http://www.openwall.com/lists/oss-security/2017/01/13/3
- http://www.securityfocus.com/bid/95422
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZVH54XNZ77ICNBJTPI2DLJYQTA3SYSFC/
- https://lists.gnu.org/archive/html/bug-ed/2017-01/msg00000.html