CVE-2007-1558
The APOP protocol allows remote attackers to guess the first 3 characters of a password via man-in-the-middle (MITM) attacks that use crafted message IDs and MD5 collisions. NOTE: this design-level
02 Description
The APOP protocol allows remote attackers to guess the first 3 characters of a password via man-in-the-middle (MITM) attacks that use crafted message IDs and MD5 collisions. NOTE: this design-level
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.42% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 83.7% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2007-04-16 22:00Z19 YR AGO
- Last updated
- 2024-08-07 12:59Z2 YR AGO
- Reserved
- 2007-03-20
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- No CWE assigned
- Data version
- 5.1
- Document digest
- 2af0671dafe487893efeb3b6de6a50b934d9b0067ad7f0da838649f2f500d54e
05 Affected products
06 References
- secunia.com25496http://secunia.com/advisories/25496
- secunia.com25529http://secunia.com/advisories/25529
- sourceforge.nethttp://sourceforge.net/forum/forum.php?forum_id=683706
- docs.info.apple.comhttp://docs.info.apple.com/article.html?artnum=305530
- www.claws-mail.orghttp://www.claws-mail.org/news.php
- www.mandriva.comMDKSA-2007:107http://www.mandriva.com/security/advisories?name=MDKSA-2007:107
- www.trustix.org2007-0024http://www.trustix.org/errata/2007/0024/
- www.securityfocus.com20070403 Re: APOP vulnerabilityhttp://www.securityfocus.com/archive/1/464569/100/0/threaded
- secunia.com25894http://secunia.com/advisories/25894
- www.securityfocus.com20070615 rPSA-2007-0122-1 evolution-data-serverhttp://www.securityfocus.com/archive/1/471455/100/0/threaded
- www.vupen.comADV-2007-1939http://www.vupen.com/english/advisories/2007/1939
- secunia.com26083http://secunia.com/advisories/26083
- www.vupen.comADV-2007-1468http://www.vupen.com/english/advisories/2007/1468
- www.redhat.comRHSA-2009:1140http://www.redhat.com/support/errata/RHSA-2009-1140.html
- h20000.www2.hp.comHPSBUX02156http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00774579
- www.securityfocus.com20070531 FLEA-2007-0023-1: firefoxhttp://www.securityfocus.com/archive/1/470172/100/200/threaded
- secunia.com26415http://secunia.com/advisories/26415
- fetchmail.berlios.dehttp://fetchmail.berlios.de/fetchmail-SA-2007-01.txt
- www.openwall.com[oss-security] 20090818 Re: CVE-2007-1558 update (was: mailfilter 0.8.2 fixes CVE-2007-1558 (APOP))http://www.openwall.com/lists/oss-security/2009/08/18/1
- lists.apple.comAPPLE-SA-2007-05-24http://lists.apple.com/archives/security-announce/2007/May/msg00004.html
- www.novell.comSUSE-SR:2007:014http://www.novell.com/linux/security/advisories/2007_14_sr.html
- secunia.com25402http://secunia.com/advisories/25402
- h20000.www2.hp.comHPSBUX02153http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00771742
- www.securityfocus.com20070402 APOP vulnerabilityhttp://www.securityfocus.com/archive/1/464477/30/0/threaded
- www.novell.comSUSE-SA:2007:036http://www.novell.com/linux/security/advisories/2007_36_mozilla.html
- security.gentoo.orgGLSA-200706-06http://security.gentoo.org/glsa/glsa-200706-06.xml
- sylpheed.sraoss.jphttp://sylpheed.sraoss.jp/en/news.html
- secunia.com25534http://secunia.com/advisories/25534
- www.vupen.comADV-2007-1994http://www.vupen.com/english/advisories/2007/1994
- slackware.comSSA:2007-152-02http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.571857
- www.securityfocus.com23257http://www.securityfocus.com/bid/23257
- www.ubuntu.comUSN-469-1http://www.ubuntu.com/usn/usn-469-1
- www.mandriva.comMDKSA-2007:131http://www.mandriva.com/security/advisories?name=MDKSA-2007:131
- www.debian.orgDSA-1305http://www.debian.org/security/2007/dsa-1305
- issues.rpath.comhttps://issues.rpath.com/browse/RPL-1231
- www.vupen.comADV-2007-1467http://www.vupen.com/english/advisories/2007/1467
- www.mozilla.orghttp://www.mozilla.org/security/announce/2007/mfsa2007-15.html
- www.vupen.comADV-2007-2788http://www.vupen.com/english/advisories/2007/2788
- issues.rpath.comhttps://issues.rpath.com/browse/RPL-1424
- secunia.com25664http://secunia.com/advisories/25664
- www.mandriva.comMDKSA-2007:119http://www.mandriva.com/security/advisories?name=MDKSA-2007:119
- secunia.com25546http://secunia.com/advisories/25546
- www.redhat.comRHSA-2007:0353http://www.redhat.com/support/errata/RHSA-2007-0353.html
- www.redhat.comRHSA-2007:0385http://www.redhat.com/support/errata/RHSA-2007-0385.html
- secunia.com25858http://secunia.com/advisories/25858
- secunia.com25798http://secunia.com/advisories/25798
- secunia.com25353http://secunia.com/advisories/25353
- www.vupen.comADV-2008-0082http://www.vupen.com/english/advisories/2008/0082
- www.openwall.com[oss-security] 20090815 mailfilter 0.8.2 fixes CVE-2007-1558 (APOP)http://www.openwall.com/lists/oss-security/2009/08/15/1
- www.redhat.comRHSA-2007:0401http://www.redhat.com/support/errata/RHSA-2007-0401.html
- www.trustix.org2007-0019http://www.trustix.org/errata/2007/0019/
- secunia.com25476http://secunia.com/advisories/25476
- secunia.com35699http://secunia.com/advisories/35699
- www.mandriva.comMDKSA-2007:113http://www.mandriva.com/security/advisories?name=MDKSA-2007:113
- mail.gnome.org[balsa-list] 20070704 balsa-2.3.17 releasedhttp://mail.gnome.org/archives/balsa-list/2007-July/msg00000.html
- www.mandriva.comMDKSA-2007:105http://www.mandriva.com/security/advisories?name=MDKSA-2007:105
- www.redhat.comRHSA-2007:0386http://www.redhat.com/support/errata/RHSA-2007-0386.html
- issues.rpath.comhttps://issues.rpath.com/browse/RPL-1232
- secunia.com25750http://secunia.com/advisories/25750
- www.securityfocus.com20070619 FLEA-2007-0026-1: evolution-data-serverhttp://www.securityfocus.com/archive/1/471720/100/0/threaded
- www.debian.orgDSA-1300http://www.debian.org/security/2007/dsa-1300
- secunia.com25559http://secunia.com/advisories/25559
- www.vupen.comADV-2007-1466http://www.vupen.com/english/advisories/2007/1466
- www.securitytracker.com1018008http://www.securitytracker.com/id?1018008
- oval.cisecurity.orgoval:org.mitre.oval:def:9782https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9782
- patches.sgi.com20070602-01-Pftp://patches.sgi.com/support/free/security/advisories/20070602-01-P.asc
- www.redhat.comRHSA-2007:0402http://www.redhat.com/support/errata/RHSA-2007-0402.html
- www.vupen.comADV-2007-1480http://www.vupen.com/english/advisories/2007/1480
- www.ubuntu.comUSN-520-1http://www.ubuntu.com/usn/usn-520-1
- www.us-cert.govTA07-151Ahttp://www.us-cert.gov/cas/techalerts/TA07-151A.html
- www.redhat.comRHSA-2007:0344http://www.redhat.com/support/errata/RHSA-2007-0344.html
- www.securityfocus.com20070620 FLEA-2007-0027-1: thunderbirdhttp://www.securityfocus.com/archive/1/471842/100/0/threaded
- balsa.gnome.orghttp://balsa.gnome.org/download.html
07 Fixed in
Debian 12
- balsa Fixed in 2.3.17-1
- claws-mail Fixed in 2.9.1-1
- fetchmail Fixed in 6.3.8-1
- mailfilter Fixed in 0.8.2-1
- mutt Fixed in 1.5.18-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- balsa Fixed in 2.3.17-1
- claws-mail Fixed in 2.9.1-1
- fetchmail Fixed in 6.3.8-1
- mailfilter Fixed in 0.8.2-1
- mutt Fixed in 1.5.18-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- balsa Fixed in 2.3.17-1
- claws-mail Fixed in 2.9.1-1
- fetchmail Fixed in 6.3.8-1
- mailfilter Fixed in 0.8.2-1
- mutt Fixed in 1.5.18-6
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.