CVE-2018-10887 Information

Description

A flaw was found in libgit2 before version 0.27.3. It has been discovered that an unexpected sign extension in git_delta_apply function in delta.c file may lead to an integer overflow which in turn leads to an out of bound read allowing to read before the base object. An attacker may use this flaw to leak memory addresses or cause a Denial of Service.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1598021 https://github.com/libgit2/libgit2/commit/3f461902dc1072acb8b7607ee65d0a0458ffac2a https://github.com/libgit2/libgit2/commit/c1577110467b701dcbcf9439ac225ea851b47d22 https://github.com/libgit2/libgit2/releases/tag/v0.27.3 https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

8.1