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01 Record

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

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector

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

VendorProductVersionsPlatforms
apop_protocolapop_protocolNot specified—
redhatenterprise_linuxNot specified—

06 References

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.