Out-of-bounds read in libgit2 - CVE-2018-15501
Published: August 25, 2018 / Updated: August 28, 2018
Vulnerability identifier: #VU14546
CSH Severity: Low
CVSS v4: 6.9 [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]
CVE-ID: CVE-2018-15501
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to out-of-bounds read in ng_pkt in transports/smart_pkt.c in libgit2. A remote attacker can send a specially crafted smart-protocol "ng" packet that lacks a '' byte and cause the service to crash.
Affected software
libgit2
libgit2-0.27 (Alpine package)
libgit2-1.0 (Alpine package)
libgit2
Fedora
Opensuse
libgit2-0.27 (Alpine package)
libgit2-1.0 (Alpine package)
libgit2
Fedora
Opensuse
How to mitigate CVE-2018-15501
The vulnerability has been fixed in the versions 0.26.6, 0.27.4.
libgit2 - addressed in versions 0.26.6, 0.27.4
libgit2-1.0 (Alpine package) - update to 1.0.1-r1
libgit2 - update to 0.26.7-1.el7
libgit2-1.0 (Alpine package) - update to 1.0.1-r1
libgit2 - update to 0.26.7-1.el7