CVE-2018-15501

In ngpkt in transports/smartpkt.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.

References

Affected packages

Git / github.com/libgit2/libgit2

Affected ranges

Type: GIT
Repo: https://github.com/libgit2/libgit2
Events: Fixed

1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649

Fixed

8b89f362a34fcccdf1c6c5f3445895b71d9c6d56

Introduced

6311e886d8b5377c6037cd9937ccf66a71f3361d

Fixed

8b89f362a34fcccdf1c6c5f3445895b71d9c6d56

Fixed

e98d0a37c93574d2c6107bf7f31140b548c6a7bf

Affected versions

v0.*

v0.27.0

v0.27.1

v0.27.2

v0.27.3

Database specific

vanir_signatures

[
    {
        "signature_type": "Function",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "src/transports/smart_pkt.c",
            "function": "ng_pkt"
        },
        "source": "https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649",
        "id": "CVE-2018-15501-606741fe",
        "digest": {
            "function_hash": "138826696511010238732541932636188295741",
            "length": 908.0
        }
    },
    {
        "signature_type": "Line",
        "signature_version": "v1",
        "deprecated": false,
        "target": {
            "file": "src/transports/smart_pkt.c"
        },
        "source": "https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649",
        "id": "CVE-2018-15501-cee72982",
        "digest": {
            "line_hashes": [
                "277944573312571448173291964358782886837",
                "36280656565145144977492951188865350869",
                "302331465101043077794962941694367824538",
                "294618928152091666896038200414798230595",
                "207907076655417259776009322911410236434",
                "107580828438128948544648617943369281976",
                "302059678418441467271694324972509664904",
                "329815054368941535576649484587697607592",
                "83354471640335339165381725665650886157",
                "20275277051791725878689896175251433783"
            ],
            "threshold": 0.9
        }
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-15501.json"