Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2018-15501

In ng_pkt in transports/smart_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker can send a crafted smart-protocol "ng" packet that lacks a '\0' byte to trigger an out-of-bounds read that leads to DoS.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 2 products from debian, from libgit2 organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-08-18T02:29:01.713

Last Modified

2024-11-21T03:50:56.910

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Application	libgit2	libgit2	< 0.26.6	Yes
Application	libgit2	libgit2	< 0.27.4	Yes

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9406 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://bugzilla.suse.com/show_bug.cgi?id=1104641 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649 Patch, Third Party Advisory ([email protected])
https://github.com/libgit2/libgit2/releases/tag/v0.26.6 Release Notes, Third Party Advisory ([email protected])
https://github.com/libgit2/libgit2/releases/tag/v0.27.4 Release Notes, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html Mailing List, Third Party Advisory ([email protected])
https://www.pro-linux.de/sicherheit/2/44650/denial-of-service-in-libgit2.html Third Party Advisory ([email protected])
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9406 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.suse.com/show_bug.cgi?id=1104641 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libgit2/libgit2/releases/tag/v0.26.6 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libgit2/libgit2/releases/tag/v0.27.4 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/08/msg00024.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/03/msg00031.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.pro-linux.de/sicherheit/2/44650/denial-of-service-in-libgit2.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For debian's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.