CURL-CVE-2018-16839

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Source
https://curl.se/docs/CVE-2018-16839.html
Import Source
https://curl.se/docs/CURL-CVE-2018-16839.json
JSON Data
https://api.test.osv.dev/v1/vulns/CURL-CVE-2018-16839
Aliases
Published
2018-10-31T08:00:00Z
Modified
2026-05-21T06:00:27.917695246Z
Summary
SASL password overflow via integer overflow
Details

libcurl contains a buffer overrun in the SASL authentication code.

The internal function Curl_auth_create_plain_message fails to correctly verify that the passed in lengths for name and password are not too long, then calculates a buffer size to allocate.

On systems with a 32-bit size_t, the math to calculate the buffer size triggers an integer overflow when the username length exceeds 1GB and the password name length is close to 2GB in size. This integer overflow usually causes a tiny buffer to actually get allocated instead of the intended huge one, making the use of that buffer end up in a heap buffer overflow.

(This bug is similar to CVE-2018-14618.)

Database specific 
{
    "CWE": {
        "id": "CWE-131",
        "desc": "Incorrect Calculation of Buffer Size"
    },
    "severity": "Low",
    "www": "https://curl.se/docs/CVE-2018-16839.html",
    "affects": "both",
    "URL": "https://curl.se/docs/CVE-2018-16839.json",
    "package": "curl",
    "last_affected": "7.61.1"
}
References
Credits
    • Harry Sintonen - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.33.0
Fixed
7.62.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
c56f9797e7feb7c2dc93bc389d4b85cc75220d77
Fixed
f3a24d7916b9173c69a3e0ee790102993833d6c5

Affected versions

7.*
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
Other
curl-7_33_0
curl-7_34_0
curl-7_35_0
curl-7_36_0
curl-7_37_0
curl-7_37_1
curl-7_38_0
curl-7_39_0
curl-7_40_0
curl-7_41_0
curl-7_42_0
curl-7_42_1
curl-7_43_0
curl-7_44_0
curl-7_45_0
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1
curl-7_55_0
curl-7_55_1
curl-7_56_0
curl-7_56_1
curl-7_57_0
curl-7_58_0
curl-7_59_0
curl-7_60_0
curl-7_61_0
curl-7_61_1

Database specific

source 
"https://curl.se/docs/CURL-CVE-2018-16839.json"