CVE-2017-2669

Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.

References

Affected packages

Git / github.com/dovecot/core

Affected ranges

Type: GIT
Repo: https://github.com/dovecot/core
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

000030feb7a30f193197f1aab8a7b04a26b42735

Affected versions

1.*

1.1.alpha1

1.1.alpha2

1.1.alpha4

1.1.alpha5

1.1.alpha6

1.1.beta1

1.1.beta10

1.1.beta11

1.1.beta12

1.1.beta13

1.1.beta14

1.1.beta16

1.1.beta2

1.1.beta3

1.1.beta4

1.1.beta5

1.1.beta6

1.1.beta8

1.1.beta9

1.1.rc1

1.1.rc2

1.1.rc3

1.1.rc4

1.1.rc5

1.1.rc6

1.1.rc7

1.1.rc8

1.2.alpha1

1.2.alpha2

1.2.alpha3

1.2.alpha4

1.2.alpha5

1.2.beta1

1.2.beta2

1.2.beta3

1.2.beta4

1.2.rc1

2.*

2.0.0

2.0.1

2.0.10

2.0.11

2.0.12

2.0.13

2.0.14

2.0.15

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

2.0.alpha1

2.0.alpha2

2.0.alpha3

2.0.beta1

2.0.beta2

2.0.beta3

2.0.beta4

2.0.beta5

2.0.beta6

2.0.rc1

2.0.rc2

2.0.rc3

2.0.rc4

2.0.rc5

2.0.rc6

2.1.0

2.1.1

2.1.10

2.1.11

2.1.12

2.1.13

2.1.14

2.1.15

2.1.16

2.1.2

2.1.3

2.1.4

2.1.5

2.1.6

2.1.7

2.1.8

2.1.9

2.1.alpha1

2.1.alpha2

2.1.beta1

2.1.rc1

2.1.rc2

2.1.rc3

2.1.rc4

2.1.rc5

2.1.rc6

2.1.rc7

2.2.0

2.2.1

2.2.10

2.2.11

2.2.12

2.2.13

2.2.13.rc1

2.2.14

2.2.14.rc1

2.2.15

2.2.16

2.2.16.rc1

2.2.17

2.2.17.rc1

2.2.17.rc2

2.2.18

2.2.19

2.2.19.rc1

2.2.19.rc2

2.2.2

2.2.20

2.2.20.rc1

2.2.3

2.2.4

2.2.5

2.2.6

2.2.7

2.2.8

2.2.9

2.2.alpha1

2.2.beta1

2.2.beta2

2.2.rc1

2.2.rc2

2.2.rc3

2.2.rc4

2.2.rc5

2.2.rc6

2.2.rc7

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735",
        "target": {
            "file": "src/auth/db-dict.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2017-2669-8b3a137b",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "267636158964568098863636960298466532724",
                "2352569610556384996954443346264017109",
                "93946251500024901057239984742115296506",
                "24637658557778190796647398033891828969",
                "211611469493583939446357562940970616992",
                "278277978705547623851111021639629407269",
                "124382171383543376698073773677944138094",
                "187087530198002650493950430766339868348",
                "162450648597069746051999601511029220517"
            ]
        },
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735",
        "target": {
            "function": "db_dict_iter_lookup_key_values",
            "file": "src/auth/db-dict.c"
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2017-2669-a636a152",
        "digest": {
            "length": 1242.0,
            "function_hash": "258390715530272175125914701927623207390"
        },
        "signature_type": "Function"
    }
]