CVE-2020-27507

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-27507
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-27507.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-27507
Downstream
Published
2023-03-15T20:15:10Z
Modified
2025-09-19T12:14:11.392986Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

The Kamailio SIP before 5.5.0 server mishandles INVITE requests with duplicated fields and overlength tag, leading to a buffer overflow that crashes the server or possibly have unspecified other impact.

References

Affected packages

Git / github.com/kamailio/kamailio

Affected ranges

Type
GIT
Repo
https://github.com/kamailio/kamailio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ada3701d22b1fd579f06b4f54fa695fa988e685f

Affected versions

3.*

3.0_pre1

Other

after_0_9_4_pkg_merge
after_makefile_merges
after_testing_0_8_12_r0_merge
after_testing_0_8_12_r1_merge
after_xl
before_db_api_changes
before_dest_info_changes_2
before_kill_repl_add_rm
before_lumps_split
before_malloc_changes
before_new_timers
before_pa
before_replication_patch
before_socket_info_lists
before_str2ip_changes
before_tcp_port_aliases
before_testing_0_8_12_r0_merge
before_testing_0_8_12_r1_merge
before_tm_timers
before_xl
bflmpsvz
bigbang
bogdan_final_version
budvar
fixstats
gpled
ipv4_working
ipv6
last_merge_to_janakj
listen_ifs
mem-fixes
myself_port_lo
new_cfg_compiles
new_hash
new_timers
old_mod_iface
orig
ported_ser_cvs_modules
post-zt
pre-bigbang
pre-zt
pre22
pre6-tcp4
pre6-tcp5-tm
pre_fixstats
pregpl
pure_ser_cvs_modules
rel_0_8_11_root
rel_0_9_0_root
ser_0-8-6-4
ser_081-plugins
ser_082
ser_0839_errors
ser_0_7
ser_0_8_10
ser_0_8_10_pre2
ser_0_8_10_pre3
ser_0_8_10_pre4
ser_0_8_10_pre5
ser_0_8_3_1
ser_0_8_3_2
ser_0_8_6-5-stable
ser_0_8_6-6-beer-release
ser_0_8_7-0-unstable
ser_0_8_8-final-cd-release
ser_0_8_9
ser_0_8_9-release
sip_083
sip_pre-plugin
sr_before_modules_merge
sr_simpleconfig
srv
tcp2
testing_0_8_12_root
tmp_pcl_tag_17368Js8
v03
v0_2
v0_8_11_pre9
v0_8_11dev34
v0_8_11pre29
v0_8_11pre29-prerelease
v0_8_11pre29-prerelease-cd
v0_8_11pre8
v0_8_12_t02_merged_w_v0_8_11pre35
v0_8_12dev-t03
v0_8_12dev_t05
v0_8_12dev_t13
v0_8_13dev-t16
v0_8_8
voicemail_0_1_0
wo_sp

sr_3.*

sr_3.1_freeze

Database specific 

{
    "vanir_signatures": [
        {
            "digest": {
                "function_hash": "114316787224008964060248551968142233233",
                "length": 5300.0
            },
            "id": "CVE-2020-27507-0f70405b",
            "source": "https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f",
            "signature_type": "Function",
            "signature_version": "v1",
            "target": {
                "file": "src/modules/tm/t_msgbuilder.c",
                "function": "build_local_reparse"
            },
            "deprecated": false
        },
        {
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "244853819632765666073470842383683866680",
                    "309167914881267807067215393314209984378",
                    "233439026921492938211186183726557894273",
                    "208478992480895715052172760531444741065",
                    "98354347111107095773283480051690903316",
                    "247666984453264000557428290713400669560",
                    "277341704800932035958278878296165285977",
                    "49356985030235935141449157401671665168",
                    "15339373829704610241290920527076321161",
                    "31324623973729729167260177738395379528",
                    "310933076340412908423676356898652860946",
                    "66769361556101405352954786194173159080",
                    "101009839613711374645398553541089531696",
                    "325287812837834173263465784407286470343",
                    "28586271685691763243815955786253738952",
                    "85518898683136243251146147658562743361",
                    "197206930985602377692022338456147357993",
                    "112024895113507828268144598513674332814",
                    "113539570549639087535043534570725549278"
                ]
            },
            "id": "CVE-2020-27507-5e3d2850",
            "source": "https://github.com/kamailio/kamailio/commit/ada3701d22b1fd579f06b4f54fa695fa988e685f",
            "signature_type": "Line",
            "signature_version": "v1",
            "target": {
                "file": "src/modules/tm/t_msgbuilder.c"
            },
            "deprecated": false
        }
    ]
}