National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2018-10887 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H (V3.0 legend)
Impact Score: 5.2
Exploitability Score: 2.8

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 5.8 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:P) (V2 legend)
Impact Subscore: 4.9
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): Partial
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized disclosure of information
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1598021 Issue Tracking Patch
https://github.com/libgit2/libgit2/commit/3f461902dc1072acb8b7607ee65d0a0458ffac2a Patch Third Party Advisory
https://github.com/libgit2/libgit2/commit/c1577110467b701dcbcf9439ac225ea851b47d22 Patch Third Party Advisory
https://github.com/libgit2/libgit2/releases/tag/v0.27.3 Patch Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html Mailing List Third Party Advisory

Technical Details

Vulnerability Type (View All)

  • Out-of-bounds Read (CWE-125)
  • Integer Overflow or Wraparound (CWE-190)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:libgit2:libgit2:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
0.27.3

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-10887
NVD Published Date:
07/10/2018
NVD Last Modified:
10/09/2019