CVE-2021-28662

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2021-28662
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28662.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-28662
Downstream
Related
Published
2021-05-27T12:15:08Z
Modified
2025-10-14T18:08:03.056567Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in Squid 4.x before 4.15 and 5.x before 5.0.6. If a remote server sends a certain response header over HTTP or HTTPS, there is a denial of service. This header can plausibly occur in benign network traffic.

References

Affected packages

Git / github.com/squid-cache/squid

Affected ranges

Type
GIT
Repo
https://github.com/squid-cache/squid
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
051824924c709bd6162a378f746fb859454c674e

Affected versions

Other

BASIC_TPROXY4
HISTORIC_RELEASES
M-staged-PR161
M-staged-PR164
M-staged-PR170
M-staged-PR176
M-staged-PR179
M-staged-PR181
M-staged-PR182
M-staged-PR186
M-staged-PR189
M-staged-PR193
M-staged-PR195
M-staged-PR196
M-staged-PR198
M-staged-PR199
M-staged-PR200
M-staged-PR202
M-staged-PR206
M-staged-PR208
M-staged-PR209
M-staged-PR210
M-staged-PR218
M-staged-PR220
M-staged-PR221
M-staged-PR225
M-staged-PR227
M-staged-PR229
M-staged-PR230
M-staged-PR235
M-staged-PR237
M-staged-PR238
M-staged-PR239
M-staged-PR241
M-staged-PR242
M-staged-PR252
M-staged-PR255
M-staged-PR258
M-staged-PR264
M-staged-PR266
M-staged-PR267
M-staged-PR268
M-staged-PR274
M-staged-PR276
M-staged-PR293
M-staged-PR294
M-staged-PR295
M-staged-PR299
M-staged-PR306
M-staged-PR314
M-staged-PR319
M-staged-PR342
M-staged-PR345
M-staged-PR348
M-staged-PR351
M-staged-PR359
M-staged-PR364
M-staged-PR365
M-staged-PR366
M-staged-PR370
M-staged-PR372
M-staged-PR373
M-staged-PR375
M-staged-PR376
SQUID_3_0_PRE1
SQUID_3_0_PRE2
SQUID_3_0_PRE3
SQUID_3_0_PRE4
SQUID_3_0_PRE5
SQUID_3_0_PRE6
SQUID_3_0_PRE7
SQUID_3_0_RC1
SQUID_3_5_27
SQUID_4_0_1
SQUID_4_0_10
SQUID_4_0_11
SQUID_4_0_12
SQUID_4_0_13
SQUID_4_0_14
SQUID_4_0_15
SQUID_4_0_16
SQUID_4_0_2
SQUID_4_0_3
SQUID_4_0_4
SQUID_4_0_5
SQUID_4_0_6
SQUID_4_0_7
SQUID_4_0_8
SQUID_4_0_9
for-libecap-v0p1
merge-candidate-3-v1
merge-candidate-3-v2
sourceformat-review-1
take00
take01
take02
take03
take04
take06
take07
take08
take09
take1
take2

BumpSslServerFirst.*

BumpSslServerFirst.take01
BumpSslServerFirst.take02
BumpSslServerFirst.take03
BumpSslServerFirst.take04
BumpSslServerFirst.take05
BumpSslServerFirst.take06
BumpSslServerFirst.take07
BumpSslServerFirst.take08
BumpSslServerFirst.take09
BumpSslServerFirst.take10

Database specific 

{
    "vanir_signatures": [
        {
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "246787021619791419152269128153398552627",
                    "137540088876487517479355767659710642705",
                    "2037448173086037427154046699180625686",
                    "111963318781500401476263553951823657637"
                ]
            },
            "signature_version": "v1",
            "deprecated": false,
            "source": "https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674e",
            "target": {
                "file": "src/http/RegisteredHeaders.cc"
            },
            "id": "CVE-2021-28662-ac67f9e9",
            "signature_type": "Line"
        },
        {
            "digest": {
                "length": 211.0,
                "function_hash": "213594514490356346423760141520931754203"
            },
            "signature_version": "v1",
            "deprecated": false,
            "source": "https://github.com/squid-cache/squid/commit/051824924c709bd6162a378f746fb859454c674e",
            "target": {
                "file": "src/http/RegisteredHeaders.cc",
                "function": "HeaderLookupTable_t::lookup"
            },
            "id": "CVE-2021-28662-b5ea6bf5",
            "signature_type": "Function"
        }
    ]
}