Integer overflow in libgit2-1.0 (Alpine package)

1) Integer overflow

EUVDB-ID: #VU13842

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10887

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The vulnerability exists due to integer overflow when unexpected sign extension in the git_delta_apply function of the delta.c file. A remote unauthenticated attacker can trigger an out-of-bounds read condition, bypass bounds check and read sensitive memory information or cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libgit2-1.0 (Alpine package): 1.0.1-r0

External links

http://git.alpinelinux.org/aports/commit/?id=6425be941961881e542ff2604ea869f94f51c0a8

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.