Django REST framework

Vulnerability Instance

Lookup for vulnerabilities affecting packages.

Vulnerability_idVCID-48u8-uvvd-m7ef
SummaryOpenSSH privilege separation flaw
Aliases
0
alias CVE-2006-5794
Fixed_packages
0
url pkg:deb/debian/openssh@1:4.3p2-6?distro=trixie
purl pkg:deb/debian/openssh@1:4.3p2-6?distro=trixie
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:4.3p2-6%3Fdistro=trixie
1
url pkg:deb/debian/openssh@1:4.3p2-9etch2%2Bm68k1
purl pkg:deb/debian/openssh@1:4.3p2-9etch2%2Bm68k1
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-11sf-sq1n-8ybk
1
vulnerability VCID-27t6-mvt2-6kcd
2
vulnerability VCID-3mzh-y1ek-cqh9
3
vulnerability VCID-45wb-44rx-1bhw
4
vulnerability VCID-4fj8-vfgx-pyh9
5
vulnerability VCID-6n7q-b264-b3c9
6
vulnerability VCID-81na-a8p9-3fc3
7
vulnerability VCID-84r3-6n5q-1kft
8
vulnerability VCID-87uy-3q5r-r3b7
9
vulnerability VCID-9x46-xm8n-m3bs
10
vulnerability VCID-9zr9-947g-g7dn
11
vulnerability VCID-a7kr-mfau-bufd
12
vulnerability VCID-aaue-a343-u7f5
13
vulnerability VCID-ajmg-5kgx-k7h5
14
vulnerability VCID-bdnh-bkx5-h3fe
15
vulnerability VCID-c72q-f2cy-eqgc
16
vulnerability VCID-dw3s-w6py-muh9
17
vulnerability VCID-e3hw-afkw-f7bt
18
vulnerability VCID-fczw-59xy-83c6
19
vulnerability VCID-g1vx-bcxw-mqfg
20
vulnerability VCID-g5qe-8p8p-3kd6
21
vulnerability VCID-g8g3-ts9j-8uab
22
vulnerability VCID-ge2m-my5w-z3eb
23
vulnerability VCID-gns3-z8js-4fef
24
vulnerability VCID-gzmm-8kvw-6qbv
25
vulnerability VCID-ha8v-pqwf-r3a1
26
vulnerability VCID-hmqc-xunp-myap
27
vulnerability VCID-hse5-y15y-n3dw
28
vulnerability VCID-jzn6-bzzf-nugp
29
vulnerability VCID-k8ae-fc4a-gycy
30
vulnerability VCID-kbba-6c9u-tygk
31
vulnerability VCID-mpex-kz3k-97aq
32
vulnerability VCID-myec-kc76-9bc1
33
vulnerability VCID-qt1x-kyuf-gker
34
vulnerability VCID-qx5k-n11s-rucg
35
vulnerability VCID-t1sg-4bvj-qqfk
36
vulnerability VCID-tqd9-nyt5-13e7
37
vulnerability VCID-u21t-acnr-dub2
38
vulnerability VCID-u4sn-d8j6-bkdx
39
vulnerability VCID-ubjj-qb2c-n3d4
40
vulnerability VCID-v1vq-wecd-1ud9
41
vulnerability VCID-v27n-4vt2-rffw
42
vulnerability VCID-vj3u-a1c3-6qe5
43
vulnerability VCID-vrgz-eguk-k3dy
44
vulnerability VCID-wkpy-uwex-93db
45
vulnerability VCID-yrvb-stza-yfdp
46
vulnerability VCID-yrzy-er8x-c3ad
47
vulnerability VCID-ytkr-ev34-buhd
48
vulnerability VCID-zncv-645p-f3gn
49
vulnerability VCID-zxw6-2um9-23e7
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:4.3p2-9etch2%252Bm68k1
2
url pkg:deb/debian/openssh@1:8.4p1-5%2Bdeb11u3?distro=trixie
purl pkg:deb/debian/openssh@1:8.4p1-5%2Bdeb11u3?distro=trixie
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-792n-jkzj-qqhd
1
vulnerability VCID-8efr-budq-6bb6
2
vulnerability VCID-a4eq-r71a-buhm
3
vulnerability VCID-a7m6-uqbt-nqd9
4
vulnerability VCID-ajmg-5kgx-k7h5
5
vulnerability VCID-b4uc-yh56-muej
6
vulnerability VCID-bnrq-2fsr-mfgd
7
vulnerability VCID-kgn5-p8kx-qucj
8
vulnerability VCID-wga4-sqwk-4bfj
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:8.4p1-5%252Bdeb11u3%3Fdistro=trixie
3
url pkg:deb/debian/openssh@1:9.2p1-2%2Bdeb12u7?distro=trixie
purl pkg:deb/debian/openssh@1:9.2p1-2%2Bdeb12u7?distro=trixie
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-792n-jkzj-qqhd
1
vulnerability VCID-8efr-budq-6bb6
2
vulnerability VCID-a4eq-r71a-buhm
3
vulnerability VCID-a7m6-uqbt-nqd9
4
vulnerability VCID-ajmg-5kgx-k7h5
5
vulnerability VCID-bnrq-2fsr-mfgd
6
vulnerability VCID-kgn5-p8kx-qucj
7
vulnerability VCID-wga4-sqwk-4bfj
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:9.2p1-2%252Bdeb12u7%3Fdistro=trixie
4
url pkg:deb/debian/openssh@1:10.0p1-7%2Bdeb13u1?distro=trixie
purl pkg:deb/debian/openssh@1:10.0p1-7%2Bdeb13u1?distro=trixie
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-792n-jkzj-qqhd
1
vulnerability VCID-8efr-budq-6bb6
2
vulnerability VCID-a4eq-r71a-buhm
3
vulnerability VCID-ajmg-5kgx-k7h5
4
vulnerability VCID-bnrq-2fsr-mfgd
5
vulnerability VCID-kgn5-p8kx-qucj
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:10.0p1-7%252Bdeb13u1%3Fdistro=trixie
5
url pkg:deb/debian/openssh@1:10.2p1-6?distro=trixie
purl pkg:deb/debian/openssh@1:10.2p1-6?distro=trixie
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-792n-jkzj-qqhd
1
vulnerability VCID-8efr-budq-6bb6
2
vulnerability VCID-a4eq-r71a-buhm
3
vulnerability VCID-bnrq-2fsr-mfgd
4
vulnerability VCID-kgn5-p8kx-qucj
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:10.2p1-6%3Fdistro=trixie
6
url pkg:deb/debian/openssh@1:10.3p1-1?distro=trixie
purl pkg:deb/debian/openssh@1:10.3p1-1?distro=trixie
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:10.3p1-1%3Fdistro=trixie
Affected_packages
0
url pkg:deb/debian/openssh@1:3.4p1-1.woody.3
purl pkg:deb/debian/openssh@1:3.4p1-1.woody.3
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-11sf-sq1n-8ybk
1
vulnerability VCID-1pq3-ktfr-vqa4
2
vulnerability VCID-27t6-mvt2-6kcd
3
vulnerability VCID-3mzh-y1ek-cqh9
4
vulnerability VCID-45wb-44rx-1bhw
5
vulnerability VCID-48u8-uvvd-m7ef
6
vulnerability VCID-4fj8-vfgx-pyh9
7
vulnerability VCID-61qv-3p82-fuh9
8
vulnerability VCID-679v-qrkw-qbar
9
vulnerability VCID-6n7q-b264-b3c9
10
vulnerability VCID-6tgm-yq5b-gyev
11
vulnerability VCID-81na-a8p9-3fc3
12
vulnerability VCID-84r3-6n5q-1kft
13
vulnerability VCID-87uy-3q5r-r3b7
14
vulnerability VCID-9x46-xm8n-m3bs
15
vulnerability VCID-9zr9-947g-g7dn
16
vulnerability VCID-a7kr-mfau-bufd
17
vulnerability VCID-aaue-a343-u7f5
18
vulnerability VCID-ajmg-5kgx-k7h5
19
vulnerability VCID-akd1-gm5s-cfcs
20
vulnerability VCID-bdnh-bkx5-h3fe
21
vulnerability VCID-bemm-xfxx-bqhb
22
vulnerability VCID-c72q-f2cy-eqgc
23
vulnerability VCID-dw3s-w6py-muh9
24
vulnerability VCID-e3hw-afkw-f7bt
25
vulnerability VCID-fczw-59xy-83c6
26
vulnerability VCID-g1vx-bcxw-mqfg
27
vulnerability VCID-g5qe-8p8p-3kd6
28
vulnerability VCID-g8g3-ts9j-8uab
29
vulnerability VCID-ge2m-my5w-z3eb
30
vulnerability VCID-gns3-z8js-4fef
31
vulnerability VCID-gzmm-8kvw-6qbv
32
vulnerability VCID-ha8v-pqwf-r3a1
33
vulnerability VCID-hmqc-xunp-myap
34
vulnerability VCID-hse5-y15y-n3dw
35
vulnerability VCID-hu66-jpbe-dfhn
36
vulnerability VCID-jzk9-kyvp-5qdz
37
vulnerability VCID-jzn6-bzzf-nugp
38
vulnerability VCID-k8ae-fc4a-gycy
39
vulnerability VCID-kbba-6c9u-tygk
40
vulnerability VCID-kgja-5xxj-1ucg
41
vulnerability VCID-m6qv-m21j-g3cj
42
vulnerability VCID-mpex-kz3k-97aq
43
vulnerability VCID-myec-kc76-9bc1
44
vulnerability VCID-nrj6-k3qf-2ubp
45
vulnerability VCID-p5ps-aad3-que9
46
vulnerability VCID-qt1x-kyuf-gker
47
vulnerability VCID-qx5k-n11s-rucg
48
vulnerability VCID-rwzw-vrhk-sqfw
49
vulnerability VCID-sv83-ggsr-27au
50
vulnerability VCID-t1sg-4bvj-qqfk
51
vulnerability VCID-tqd9-nyt5-13e7
52
vulnerability VCID-tur1-ruxr-yqe3
53
vulnerability VCID-u21t-acnr-dub2
54
vulnerability VCID-u4sn-d8j6-bkdx
55
vulnerability VCID-u8z5-76zk-hqah
56
vulnerability VCID-ubjj-qb2c-n3d4
57
vulnerability VCID-v1vq-wecd-1ud9
58
vulnerability VCID-v27n-4vt2-rffw
59
vulnerability VCID-vj3u-a1c3-6qe5
60
vulnerability VCID-vrgz-eguk-k3dy
61
vulnerability VCID-wkpy-uwex-93db
62
vulnerability VCID-wx7h-g53d-67eh
63
vulnerability VCID-yrvb-stza-yfdp
64
vulnerability VCID-yrzy-er8x-c3ad
65
vulnerability VCID-ytkr-ev34-buhd
66
vulnerability VCID-z21r-z4zr-p3ex
67
vulnerability VCID-zncv-645p-f3gn
68
vulnerability VCID-zxw6-2um9-23e7
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:3.4p1-1.woody.3
1
url pkg:deb/debian/openssh@1:3.8.1p1-8.sarge.6
purl pkg:deb/debian/openssh@1:3.8.1p1-8.sarge.6
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-11sf-sq1n-8ybk
1
vulnerability VCID-27t6-mvt2-6kcd
2
vulnerability VCID-3mzh-y1ek-cqh9
3
vulnerability VCID-45wb-44rx-1bhw
4
vulnerability VCID-48u8-uvvd-m7ef
5
vulnerability VCID-4fj8-vfgx-pyh9
6
vulnerability VCID-6n7q-b264-b3c9
7
vulnerability VCID-81na-a8p9-3fc3
8
vulnerability VCID-84r3-6n5q-1kft
9
vulnerability VCID-87uy-3q5r-r3b7
10
vulnerability VCID-9x46-xm8n-m3bs
11
vulnerability VCID-9zr9-947g-g7dn
12
vulnerability VCID-a7kr-mfau-bufd
13
vulnerability VCID-aaue-a343-u7f5
14
vulnerability VCID-ajmg-5kgx-k7h5
15
vulnerability VCID-akd1-gm5s-cfcs
16
vulnerability VCID-bdnh-bkx5-h3fe
17
vulnerability VCID-c72q-f2cy-eqgc
18
vulnerability VCID-dw3s-w6py-muh9
19
vulnerability VCID-e3hw-afkw-f7bt
20
vulnerability VCID-fczw-59xy-83c6
21
vulnerability VCID-g1vx-bcxw-mqfg
22
vulnerability VCID-g5qe-8p8p-3kd6
23
vulnerability VCID-g8g3-ts9j-8uab
24
vulnerability VCID-ge2m-my5w-z3eb
25
vulnerability VCID-gns3-z8js-4fef
26
vulnerability VCID-gzmm-8kvw-6qbv
27
vulnerability VCID-ha8v-pqwf-r3a1
28
vulnerability VCID-hmqc-xunp-myap
29
vulnerability VCID-hse5-y15y-n3dw
30
vulnerability VCID-jzk9-kyvp-5qdz
31
vulnerability VCID-jzn6-bzzf-nugp
32
vulnerability VCID-k8ae-fc4a-gycy
33
vulnerability VCID-kbba-6c9u-tygk
34
vulnerability VCID-mpex-kz3k-97aq
35
vulnerability VCID-myec-kc76-9bc1
36
vulnerability VCID-p5ps-aad3-que9
37
vulnerability VCID-qt1x-kyuf-gker
38
vulnerability VCID-qx5k-n11s-rucg
39
vulnerability VCID-rwzw-vrhk-sqfw
40
vulnerability VCID-sv83-ggsr-27au
41
vulnerability VCID-t1sg-4bvj-qqfk
42
vulnerability VCID-tqd9-nyt5-13e7
43
vulnerability VCID-tur1-ruxr-yqe3
44
vulnerability VCID-u21t-acnr-dub2
45
vulnerability VCID-u4sn-d8j6-bkdx
46
vulnerability VCID-ubjj-qb2c-n3d4
47
vulnerability VCID-v1vq-wecd-1ud9
48
vulnerability VCID-v27n-4vt2-rffw
49
vulnerability VCID-vj3u-a1c3-6qe5
50
vulnerability VCID-vrgz-eguk-k3dy
51
vulnerability VCID-wkpy-uwex-93db
52
vulnerability VCID-yrvb-stza-yfdp
53
vulnerability VCID-yrzy-er8x-c3ad
54
vulnerability VCID-ytkr-ev34-buhd
55
vulnerability VCID-z21r-z4zr-p3ex
56
vulnerability VCID-zncv-645p-f3gn
57
vulnerability VCID-zxw6-2um9-23e7
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/openssh@1:3.8.1p1-8.sarge.6
2
url pkg:rpm/redhat/openssh@3.6.1p2-33.30?arch=13
purl pkg:rpm/redhat/openssh@3.6.1p2-33.30?arch=13
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-48u8-uvvd-m7ef
resource_url http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/openssh@3.6.1p2-33.30%3Farch=13
3
url pkg:rpm/redhat/openssh@3.9p1-8.RHEL4.17?arch=1
purl pkg:rpm/redhat/openssh@3.9p1-8.RHEL4.17?arch=1
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-48u8-uvvd-m7ef
resource_url http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/openssh@3.9p1-8.RHEL4.17%3Farch=1
References
0
reference_url ftp://patches.sgi.com/support/free/security/advisories/20061201-01-P.asc
reference_id
reference_type
scores
url ftp://patches.sgi.com/support/free/security/advisories/20061201-01-P.asc
1
reference_url http://rhn.redhat.com/errata/RHSA-2006-0738.html
reference_id
reference_type
scores
url http://rhn.redhat.com/errata/RHSA-2006-0738.html
2
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2006-5794.json
reference_id
reference_type
scores
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2006-5794.json
3
reference_url https://api.first.org/data/v1/epss?cve=CVE-2006-5794
reference_id
reference_type
scores
0
value 0.04037
scoring_system epss
scoring_elements 0.8851
published_at 2026-04-18T12:55:00Z
1
value 0.04037
scoring_system epss
scoring_elements 0.88445
published_at 2026-04-01T12:55:00Z
2
value 0.04037
scoring_system epss
scoring_elements 0.88453
published_at 2026-04-02T12:55:00Z
3
value 0.04037
scoring_system epss
scoring_elements 0.88468
published_at 2026-04-04T12:55:00Z
4
value 0.04037
scoring_system epss
scoring_elements 0.88472
published_at 2026-04-07T12:55:00Z
5
value 0.04037
scoring_system epss
scoring_elements 0.8849
published_at 2026-04-08T12:55:00Z
6
value 0.04037
scoring_system epss
scoring_elements 0.88497
published_at 2026-04-09T12:55:00Z
7
value 0.04037
scoring_system epss
scoring_elements 0.88507
published_at 2026-04-11T12:55:00Z
8
value 0.04037
scoring_system epss
scoring_elements 0.885
published_at 2026-04-13T12:55:00Z
9
value 0.04037
scoring_system epss
scoring_elements 0.88514
published_at 2026-04-16T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2006-5794
4
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5794
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5794
5
reference_url http://secunia.com/advisories/22771
reference_id
reference_type
scores
url http://secunia.com/advisories/22771
6
reference_url http://secunia.com/advisories/22772
reference_id
reference_type
scores
url http://secunia.com/advisories/22772
7
reference_url http://secunia.com/advisories/22773
reference_id
reference_type
scores
url http://secunia.com/advisories/22773
8
reference_url http://secunia.com/advisories/22778
reference_id
reference_type
scores
url http://secunia.com/advisories/22778
9
reference_url http://secunia.com/advisories/22814
reference_id
reference_type
scores
url http://secunia.com/advisories/22814
10
reference_url http://secunia.com/advisories/22872
reference_id
reference_type
scores
url http://secunia.com/advisories/22872
11
reference_url http://secunia.com/advisories/22932
reference_id
reference_type
scores
url http://secunia.com/advisories/22932
12
reference_url http://secunia.com/advisories/23513
reference_id
reference_type
scores
url http://secunia.com/advisories/23513
13
reference_url http://secunia.com/advisories/23680
reference_id
reference_type
scores
url http://secunia.com/advisories/23680
14
reference_url http://secunia.com/advisories/24055
reference_id
reference_type
scores
url http://secunia.com/advisories/24055
15
reference_url http://securitytracker.com/id?1017183
reference_id
reference_type
scores
url http://securitytracker.com/id?1017183
16
reference_url https://exchange.xforce.ibmcloud.com/vulnerabilities/30120
reference_id
reference_type
scores
url https://exchange.xforce.ibmcloud.com/vulnerabilities/30120
17
reference_url https://issues.rpath.com/browse/RPL-766
reference_id
reference_type
scores
url https://issues.rpath.com/browse/RPL-766
18
reference_url http://sourceforge.net/project/shownotes.php?release_id=461854&group_id=69227
reference_id
reference_type
scores
url http://sourceforge.net/project/shownotes.php?release_id=461854&group_id=69227
19
reference_url http://sourceforge.net/project/shownotes.php?release_id=461863&group_id=69227
reference_id
reference_type
scores
url http://sourceforge.net/project/shownotes.php?release_id=461863&group_id=69227
20
reference_url https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11840
reference_id
reference_type
scores
url https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11840
21
reference_url http://support.avaya.com/elmodocs2/security/ASA-2007-048.htm
reference_id
reference_type
scores
url http://support.avaya.com/elmodocs2/security/ASA-2007-048.htm
22
reference_url http://www.mandriva.com/security/advisories?name=MDKSA-2006:204
reference_id
reference_type
scores
url http://www.mandriva.com/security/advisories?name=MDKSA-2006:204
23
reference_url http://www.novell.com/linux/security/advisories/2006_26_sr.html
reference_id
reference_type
scores
url http://www.novell.com/linux/security/advisories/2006_26_sr.html
24
reference_url http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.032-openssh.html
reference_id
reference_type
scores
url http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.032-openssh.html
25
reference_url http://www.openssh.org/txt/release-4.5
reference_id
reference_type
scores
url http://www.openssh.org/txt/release-4.5
26
reference_url http://www.securityfocus.com/archive/1/451100/100/0/threaded
reference_id
reference_type
scores
url http://www.securityfocus.com/archive/1/451100/100/0/threaded
27
reference_url http://www.securityfocus.com/bid/20956
reference_id
reference_type
scores
url http://www.securityfocus.com/bid/20956
28
reference_url http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html
reference_id
reference_type
scores
url http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html
29
reference_url http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html
reference_id
reference_type
scores
url http://www.vmware.com/support/vi3/doc/esx-9986131-patch.html
30
reference_url http://www.vupen.com/english/advisories/2006/4399
reference_id
reference_type
scores
url http://www.vupen.com/english/advisories/2006/4399
31
reference_url http://www.vupen.com/english/advisories/2006/4400
reference_id
reference_type
scores
url http://www.vupen.com/english/advisories/2006/4400
32
reference_url https://bugzilla.redhat.com/show_bug.cgi?id=214641
reference_id 214641
reference_type
scores
url https://bugzilla.redhat.com/show_bug.cgi?id=214641
33
reference_url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
reference_id cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
reference_type
scores
url https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
34
reference_url https://nvd.nist.gov/vuln/detail/CVE-2006-5794
reference_id CVE-2006-5794
reference_type
scores
0
value 7.5
scoring_system cvssv2
scoring_elements AV:N/AC:L/Au:N/C:P/I:P/A:P
url https://nvd.nist.gov/vuln/detail/CVE-2006-5794
35
reference_url https://access.redhat.com/errata/RHSA-2006:0738
reference_id RHSA-2006:0738
reference_type
scores
url https://access.redhat.com/errata/RHSA-2006:0738
Weaknesses
Exploits
Severity_range_score7.5 - 7.5
Exploitability0.5
Weighted_severity6.8
Risk_score3.4
Resource_urlhttp://public2.vulnerablecode.io/vulnerabilities/VCID-48u8-uvvd-m7ef